121222222120 has 64 divisors (see below), whose sum is σ = 274323594240. Its totient is φ = 48209414400.

The previous prime is 121222222117. The next prime is 121222222127. The reversal of 121222222120 is 21222222121.

It is not an unprimeable number, because it can be changed into a prime (121222222127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21717730 + ... + 21723310.

It is an arithmetic number, because the mean of its divisors is an integer number (4286306160).

Almost surely, 2^121222222120 is an apocalyptic number.

121222222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121222222120 is an abundant number, since it is smaller than the sum of its proper divisors (153101372120).

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

121222222120 is a wasteful number, since it uses less digits than its factorization.

121222222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8626 (or 8622 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 121222222120 its reverse (21222222121), we get a palindrome (142444444241).

Subtracting from 121222222120 its reverse (21222222121), we obtain a palindrome (99999999999).

The spelling of 121222222120 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".