131000012004 has 48 divisors (see below), whose sum is σ = 313866233856. Its totient is φ = 42500371200.

The previous prime is 131000011973. The next prime is 131000012023. The reversal of 131000012004 is 400210000131.

It is a happy number.

It is a super-2 number, since 2×131000012004² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 109092 + ... + 523355.

It is an arithmetic number, because the mean of its divisors is an integer number (6538879872).

Almost surely, 2^131000012004 is an apocalyptic number.

It is an amenable number.

131000012004 is an abundant number, since it is smaller than the sum of its proper divisors (182866221852).

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

131000012004 is a wasteful number, since it uses less digits than its factorization.

131000012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632916 (or 632914 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 131000012004 its reverse (400210000131), we get a palindrome (531210012135).

The spelling of 131000012004 in words is "one hundred thirty-one billion, twelve thousand, four".