2151120123551 has 16 divisors (see below), whose sum is σ = 2468888294400. Its totient is φ = 1835969398368.

The previous prime is 2151120123521. The next prime is 2151120123589. The reversal of 2151120123551 is 1553210211512.

It is not a de Polignac number, because 2151120123551 - 2²² = 2151115929247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151120123511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28116716 + ... + 28193118.

It is an arithmetic number, because the mean of its divisors is an integer number (154305518400).

Almost surely, 2^{2151120123551} is an apocalyptic number.

2151120123551 is a deficient number, since it is larger than the sum of its proper divisors (317768170849).

2151120123551 is a wasteful number, since it uses less digits than its factorization.

2151120123551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93478.

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 2151120123551 in words is "two trillion, one hundred fifty-one billion, one hundred twenty million, one hundred twenty-three thousand, five hundred fifty-one".