121102020201220 has 72 divisors (see below), whose sum is σ = 270358098333120. Its totient is φ = 45549352094400.

The previous prime is 121102020201209. The next prime is 121102020201223. The reversal of 121102020201220 is 22102020201121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 121102020201194 and 121102020201203.

It is not an unprimeable number, because it can be changed into a prime (121102020201223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96378456 + ... + 97626895.

It is an arithmetic number, because the mean of its divisors is an integer number (3754973587960).

Almost surely, 2^{121102020201220} is an apocalyptic number.

121102020201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121102020201220 is an abundant number, since it is smaller than the sum of its proper divisors (149256078131900).

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

121102020201220 is a wasteful number, since it uses less digits than its factorization.

121102020201220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194005465 (or 194005440 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 121102020201220 its reverse (22102020201121), we get a palindrome (143204040402341).

Subtracting from 121102020201220 its reverse (22102020201121), we obtain a palindrome (99000000000099).

The spelling of 121102020201220 in words is "one hundred twenty-one trillion, one hundred two billion, twenty million, two hundred one thousand, two hundred twenty".