123212222120 has 32 divisors (see below), whose sum is σ = 298552693320. Its totient is φ = 45493743360.

The previous prime is 123212222057. The next prime is 123212222137. The reversal of 123212222120 is 21222212321.

123212222120 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 59634616804 + 63577605316 = 244202^2 + 252146^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 123212222092 and 123212222101.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118472771 + ... + 118473810.

Almost surely, 2^123212222120 is an apocalyptic number.

123212222120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123212222120 is an abundant number, since it is smaller than the sum of its proper divisors (175340471200).

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

123212222120 is a wasteful number, since it uses less digits than its factorization.

123212222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236946605 (or 236946601 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 123212222120 its reverse (21222212321), we get a palindrome (144434434441).

The spelling of 123212222120 in words is "one hundred twenty-three billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty".