12131004144 has 80 divisors (see below), whose sum is σ = 36144035840. Its totient is φ = 3434192640.

The previous prime is 12131004131. The next prime is 12131004161. The reversal of 12131004144 is 44140013121.

It is a super-2 number, since 2×12131004144² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12131004144.

It is a congruent number.

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, 128992 + ... + 202239.

It is an arithmetic number, because the mean of its divisors is an integer number (451800448).

Almost surely, 2^12131004144 is an apocalyptic number.

12131004144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12131004144 is an abundant number, since it is smaller than the sum of its proper divisors (24013031696).

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

12131004144 is a wasteful number, since it uses less digits than its factorization.

12131004144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331358 (or 331352 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 12131004144 its reverse (44140013121), we get a palindrome (56271017265).

The spelling of 12131004144 in words is "twelve billion, one hundred thirty-one million, four thousand, one hundred forty-four".