123212204120 has 32 divisors (see below), whose sum is σ = 277475749200. Its totient is φ = 49240741248.

The previous prime is 123212204111. The next prime is 123212204123. The reversal of 123212204120 is 21402212321.

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 = 123212204092 and 123212204101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123212204123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334150 + ... + 1423509.

Almost surely, 2^123212204120 is an apocalyptic number.

123212204120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123212204120 is an abundant number, since it is smaller than the sum of its proper divisors (154263545080).

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

123212204120 is a wasteful number, since it uses less digits than its factorization.

123212204120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758787 (or 2758783 counting only the distinct ones).

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

Adding to 123212204120 its reverse (21402212321), we get a palindrome (144614416441).

The spelling of 123212204120 in words is "one hundred twenty-three billion, two hundred twelve million, two hundred four thousand, one hundred twenty".