123210212321220 has 48 divisors (see below), whose sum is σ = 344991642428160. Its totient is φ = 32855766340096.

The previous prime is 123210212321179. The next prime is 123210212321221. The reversal of 123210212321220 is 22123212012321.

It is a super-2 number, since 2×123210212321220² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123210212321221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2180085 + ... + 15848444.

It is an arithmetic number, because the mean of its divisors is an integer number (7187325883920).

Almost surely, 2^{123210212321220} is an apocalyptic number.

123210212321220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123210212321220 is an abundant number, since it is smaller than the sum of its proper divisors (221781430106940).

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

123210212321220 is a wasteful number, since it uses less digits than its factorization.

123210212321220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18142444 (or 18142442 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 123210212321220 its reverse (22123212012321), we get a palindrome (145333424333541).

The spelling of 123210212321220 in words is "one hundred twenty-three trillion, two hundred ten billion, two hundred twelve million, three hundred twenty-one thousand, two hundred twenty".