12161131704 has 48 divisors (see below), whose sum is σ = 33353330400. Its totient is φ = 4002395904.

The previous prime is 12161131691. The next prime is 12161131709. The reversal of 12161131704 is 40713116121.

12161131704 is a `hidden beast` number, since 12 + 1 + 611 + 31 + 7 + 0 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12161131709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1063329 + ... + 1074704.

It is an arithmetic number, because the mean of its divisors is an integer number (694861050).

Almost surely, 2^12161131704 is an apocalyptic number.

It is an amenable number.

12161131704 is an abundant number, since it is smaller than the sum of its proper divisors (21192198696).

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

12161131704 is a wasteful number, since it uses less digits than its factorization.

12161131704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138124 (or 2138117 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

Adding to 12161131704 its reverse (40713116121), we get a palindrome (52874247825).

The spelling of 12161131704 in words is "twelve billion, one hundred sixty-one million, one hundred thirty-one thousand, seven hundred four".