123211313220 has 48 divisors (see below), whose sum is σ = 345073736448. Its totient is φ = 32848535040.

The previous prime is 123211313209. The next prime is 123211313233. The reversal of 123211313220 is 22313112321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12357 + ... + 496563.

It is an arithmetic number, because the mean of its divisors is an integer number (7189036176).

Almost surely, 2^123211313220 is an apocalyptic number.

123211313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123211313220 is an abundant number, since it is smaller than the sum of its proper divisors (221862423228).

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

123211313220 is a wasteful number, since it uses less digits than its factorization.

123211313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488460 (or 488458 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 123211313220 its reverse (22313112321), we get a palindrome (145524425541).

The spelling of 123211313220 in words is "one hundred twenty-three billion, two hundred eleven million, three hundred thirteen thousand, two hundred twenty".