20121510051 has 8 divisors (see below), whose sum is σ = 29809644560. Its totient is φ = 13414340016.

The previous prime is 20121510041. The next prime is 20121510053. The reversal of 20121510051 is 15001512102.

It is not a de Polignac number, because 20121510051 - 2⁷ = 20121509923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121510053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372620530 + ... + 372620583.

It is an arithmetic number, because the mean of its divisors is an integer number (3726205570).

Almost surely, 2^20121510051 is an apocalyptic number.

20121510051 is a deficient number, since it is larger than the sum of its proper divisors (9688134509).

20121510051 is an equidigital number, since it uses as much as digits as its factorization.

20121510051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745241122 (or 745241116 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The spelling of 20121510051 in words is "twenty billion, one hundred twenty-one million, five hundred ten thousand, fifty-one".