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121220111220999 = 3782317234070711
BaseRepresentation
bin11011100011111111000001…
…101010110100000100000111
3120220012112021222022000200220
4123203333001222310010013
5111342032241433032444
61105451430022435423
734350602234352450
oct3343770152640407
9526175258260626
10121220111220999
11356961846452aa
1211719329b92b73
13528401346133b
1421d1128552127
15e0332ec2b619
hex6e3fc1ab4107

121220111220999 has 32 divisors (see below), whose sum is σ = 185048184643584. Its totient is φ = 69144298483680.

The previous prime is 121220111220983. The next prime is 121220111221007. The reversal of 121220111220999 is 999022111022121.

It is not a de Polignac number, because 121220111220999 - 24 = 121220111220983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121220111220999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111220959) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27743254 + ... + 31813964.

It is an arithmetic number, because the mean of its divisors is an integer number (5782755770112).

Almost surely, 2121220111220999 is an apocalyptic number.

121220111220999 is a deficient number, since it is larger than the sum of its proper divisors (63828073422585).

121220111220999 is a wasteful number, since it uses less digits than its factorization.

121220111220999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073267.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 121220111220999 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty thousand, nine hundred ninety-nine".