123131203011220 has 48 divisors (see below), whose sum is σ = 258831903710016. Its totient is φ = 49203671328000.

The previous prime is 123131203011203. The next prime is 123131203011221. The reversal of 123131203011220 is 22110302131321.

It is a super-2 number, since 2×123131203011220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123131203011191 and 123131203011200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131203011221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81872635 + ... + 83363005.

It is an arithmetic number, because the mean of its divisors is an integer number (5392331327292).

Almost surely, 2^{123131203011220} is an apocalyptic number.

123131203011220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123131203011220 is an abundant number, since it is smaller than the sum of its proper divisors (135700700698796).

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

123131203011220 is a wasteful number, since it uses less digits than its factorization.

123131203011220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494472 (or 1494470 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 123131203011220 its reverse (22110302131321), we get a palindrome (145241505142541).

The spelling of 123131203011220 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, two hundred three million, eleven thousand, two hundred twenty".