121021222120 has 32 divisors (see below), whose sum is σ = 272888458920. Its totient is φ = 48303473920.

The previous prime is 121021222109. The next prime is 121021222169. The reversal of 121021222120 is 21222120121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 57405284836 + 63615937284 = 239594^2 + 252222^2 .

It is a super-2 number, since 2×121021222120² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121021222094 and 121021222103.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3263047 + ... + 3299926.

Almost surely, 2^121021222120 is an apocalyptic number.

121021222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121021222120 is an abundant number, since it is smaller than the sum of its proper divisors (151867236800).

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

121021222120 is a wasteful number, since it uses less digits than its factorization.

121021222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563445 (or 6563441 counting only the distinct ones).

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

Adding to 121021222120 its reverse (21222120121), we get a palindrome (142243342241).

The spelling of 121021222120 in words is "one hundred twenty-one billion, twenty-one million, two hundred twenty-two thousand, one hundred twenty".