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121220111221008 = 24314881716969963
BaseRepresentation
bin11011100011111111000001…
…101010110100000100010000
3120220012112021222022000201020
4123203333001222310010100
5111342032241433033013
61105451430022435440
734350602234352462
oct3343770152640420
9526175258260636
10121220111221008
1135696184645308
1211719329b92b80
135284013461347
1421d1128552132
15e0332ec2b623
hex6e3fc1ab4110

121220111221008 has 40 divisors (see below), whose sum is σ = 313154076716448. Its totient is φ = 40406429839872.

The previous prime is 121220111221007. The next prime is 121220111221031. The reversal of 121220111221008 is 800122111022121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (121220111221007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341766 + ... + 15628197.

Almost surely, 2121220111221008 is an apocalyptic number.

It is an amenable number.

121220111221008 is an abundant number, since it is smaller than the sum of its proper divisors (191933965495440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121220111221008 is a wasteful number, since it uses less digits than its factorization.

121220111221008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17118791 (or 17118785 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 24.

Adding to 121220111221008 its reverse (800122111022121), we get a palindrome (921342222243129).

The spelling of 121220111221008 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, eight".

Divisors: 1 2 3 4 6 8 12 16 24 48 148817 297634 446451 595268 892902 1190536 1785804 2381072 3571608 7143216 16969963 33939926 50909889 67879852 101819778 135759704 203639556 271519408 407279112 814558224 2525418983771 5050837967542 7576256951313 10101675935084 15152513902626 20203351870168 30305027805252 40406703740336 60610055610504 121220111221008