1231222222120 has 64 divisors (see below), whose sum is σ = 3022428608640. Its totient is φ = 447667142400.

The previous prime is 1231222222093. The next prime is 1231222222169. The reversal of 1231222222120 is 212222221321.

It is a happy number.

It is a super-2 number, since 2×1231222222120² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 1231222222091 and 1231222222100.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3905509 + ... + 4208971.

It is an arithmetic number, because the mean of its divisors is an integer number (47225447010).

Almost surely, 2^{1231222222120} is an apocalyptic number.

1231222222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231222222120 is an abundant number, since it is smaller than the sum of its proper divisors (1791206386520).

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

1231222222120 is a wasteful number, since it uses less digits than its factorization.

1231222222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312706 (or 312702 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 1231222222120 its reverse (212222221321), we get a palindrome (1443444443441).

The spelling of 1231222222120 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty".