51042121025 has 48 divisors (see below), whose sum is σ = 73953409536. Its totient is φ = 34218347520.

The previous prime is 51042120991. The next prime is 51042121051. The reversal of 51042121025 is 52012124015.

51042121025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51042121025 - 2¹² = 51042116929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9019997 + ... + 9025653.

It is an arithmetic number, because the mean of its divisors is an integer number (1540696032).

Almost surely, 2^51042121025 is an apocalyptic number.

It is an amenable number.

51042121025 is a deficient number, since it is larger than the sum of its proper divisors (22911288511).

51042121025 is a wasteful number, since it uses less digits than its factorization.

51042121025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818 (or 6813 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 51042121025 in words is "fifty-one billion, forty-two million, one hundred twenty-one thousand, twenty-five".