2120116861251 has 32 divisors (see below), whose sum is σ = 3194363174400. Its totient is φ = 1389362257440.

The previous prime is 2120116861243. The next prime is 2120116861319. The reversal of 2120116861251 is 1521686110212.

2120116861251 is a `hidden beast` number, since 2 + 1 + 20 + 1 + 16 + 8 + 612 + 5 + 1 = 666.

It is not a de Polignac number, because 2120116861251 - 2³ = 2120116861243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120116861351) 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, 30290986 + ... + 30360896.

It is an arithmetic number, because the mean of its divisors is an integer number (99823849200).

Almost surely, 2^{2120116861251} is an apocalyptic number.

2120116861251 is a deficient number, since it is larger than the sum of its proper divisors (1074246313149).

2120116861251 is a wasteful number, since it uses less digits than its factorization.

2120116861251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89016 (or 89010 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 2120116861251 in words is "two trillion, one hundred twenty billion, one hundred sixteen million, eight hundred sixty-one thousand, two hundred fifty-one".