12137721044761 has 16 divisors (see below), whose sum is σ = 13087832889600. Its totient is φ = 11189959691328.

The previous prime is 12137721044753. The next prime is 12137721044819. The reversal of 12137721044761 is 16744012773121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12137721044761 - 2³ = 12137721044753 is a prime.

It is a super-2 number, since 2×12137721044761² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12137721044861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234660060 + ... + 234711778.

It is an arithmetic number, because the mean of its divisors is an integer number (817989555600).

Almost surely, 2^{12137721044761} is an apocalyptic number.

It is an amenable number.

12137721044761 is a deficient number, since it is larger than the sum of its proper divisors (950111844839).

12137721044761 is a wasteful number, since it uses less digits than its factorization.

12137721044761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74088.

The product of its (nonzero) digits is 395136, while the sum is 46.

The spelling of 12137721044761 in words is "twelve trillion, one hundred thirty-seven billion, seven hundred twenty-one million, forty-four thousand, seven hundred sixty-one".