123112221203130 has 64 divisors (see below), whose sum is σ = 313071918410880. Its totient is φ = 30876823814144.

The previous prime is 123112221203107. The next prime is 123112221203131. The reversal of 123112221203130 is 31302122211321.

It is a self number, because there is not a number n which added to its sum of digits gives 123112221203130.

It is not an unprimeable number, because it can be changed into a prime (123112221203131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84943764 + ... + 86380943.

It is an arithmetic number, because the mean of its divisors is an integer number (4891748725170).

Almost surely, 2^{123112221203130} is an apocalyptic number.

123112221203130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123112221203130 is an abundant number, since it is smaller than the sum of its proper divisors (189959697207750).

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

123112221203130 is a wasteful number, since it uses less digits than its factorization.

123112221203130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171326143.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 123112221203130 its reverse (31302122211321), we get a palindrome (154414343414451).

The spelling of 123112221203130 in words is "one hundred twenty-three trillion, one hundred twelve billion, two hundred twenty-one million, two hundred three thousand, one hundred thirty".