123220312212220 has 48 divisors (see below), whose sum is σ = 267760724011200. Its totient is φ = 47575162252800.

The previous prime is 123220312212211. The next prime is 123220312212227. The reversal of 123220312212220 is 22212213022321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123220312212227) 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, 27782481 + ... + 31910920.

It is an arithmetic number, because the mean of its divisors is an integer number (5578348416900).

Almost surely, 2^{123220312212220} is an apocalyptic number.

123220312212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123220312212220 is an abundant number, since it is smaller than the sum of its proper divisors (144540411798980).

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

123220312212220 is a wasteful number, since it uses less digits than its factorization.

123220312212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59696998 (or 59696996 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 123220312212220 its reverse (22212213022321), we get a palindrome (145432525234541).

The spelling of 123220312212220 in words is "one hundred twenty-three trillion, two hundred twenty billion, three hundred twelve million, two hundred twelve thousand, two hundred twenty".