12133809961 has 32 divisors (see below), whose sum is σ = 15304101120. Its totient is φ = 9363078144.

The previous prime is 12133809929. The next prime is 12133810009. The reversal of 12133809961 is 16990833121.

It is not a de Polignac number, because 12133809961 - 2⁵ = 12133809929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (12133809361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3163701 + ... + 3167533.

It is an arithmetic number, because the mean of its divisors is an integer number (478253160).

Almost surely, 2^12133809961 is an apocalyptic number.

It is an amenable number.

12133809961 is a deficient number, since it is larger than the sum of its proper divisors (3170291159).

12133809961 is a wasteful number, since it uses less digits than its factorization.

12133809961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4705.

The product of its (nonzero) digits is 69984, while the sum is 43.

The spelling of 12133809961 in words is "twelve billion, one hundred thirty-three million, eight hundred nine thousand, nine hundred sixty-one".