123202021220 has 24 divisors (see below), whose sum is σ = 258763377600. Its totient is φ = 49273354592.

The previous prime is 123202021177. The next prime is 123202021231. The reversal of 123202021220 is 22120202321.

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, 329360 + ... + 595719.

It is an arithmetic number, because the mean of its divisors is an integer number (10781807400).

Almost surely, 2^123202021220 is an apocalyptic number.

123202021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123202021220 is an abundant number, since it is smaller than the sum of its proper divisors (135561356380).

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

123202021220 is a wasteful number, since it uses less digits than its factorization.

123202021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931747 (or 931745 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 123202021220 its reverse (22120202321), we get a palindrome (145322223541).

The spelling of 123202021220 in words is "one hundred twenty-three billion, two hundred two million, twenty-one thousand, two hundred twenty".