2660121805131 has 24 divisors (see below), whose sum is σ = 4649624669664. Its totient is φ = 1430653743360.

The previous prime is 2660121805129. The next prime is 2660121805139. The reversal of 2660121805131 is 1315081210662.

2660121805131 is a `hidden beast` number, since 2 + 6 + 60 + 1 + 2 + 1 + 80 + 513 + 1 = 666.

It is not a de Polignac number, because 2660121805131 - 2¹ = 2660121805129 is a prime.

It is a super-2 number, since 2×2660121805131² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2660121805139) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1241885860 + ... + 1241888001.

It is an arithmetic number, because the mean of its divisors is an integer number (193734361236).

Almost surely, 2^{2660121805131} is an apocalyptic number.

2660121805131 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2660121805131 is a deficient number, since it is larger than the sum of its proper divisors (1989502864533).

2660121805131 is a wasteful number, since it uses less digits than its factorization.

2660121805131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2483773891 (or 2483773888 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The spelling of 2660121805131 in words is "two trillion, six hundred sixty billion, one hundred twenty-one million, eight hundred five thousand, one hundred thirty-one".