2151225056121 has 32 divisors (see below), whose sum is σ = 3048362553600. Its totient is φ = 1346847586560.

The previous prime is 2151225056059. The next prime is 2151225056131. The reversal of 2151225056121 is 1216505221512.

It is not a de Polignac number, because 2151225056121 - 2²⁵ = 2151191501689 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151225056131) 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, 10264660 + ... + 10472138.

It is an arithmetic number, because the mean of its divisors is an integer number (95261329800).

Almost surely, 2^{2151225056121} is an apocalyptic number.

It is an amenable number.

2151225056121 is a deficient number, since it is larger than the sum of its proper divisors (897137497479).

2151225056121 is a wasteful number, since it uses less digits than its factorization.

2151225056121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210769.

The product of its (nonzero) digits is 12000, while the sum is 33.

The spelling of 2151225056121 in words is "two trillion, one hundred fifty-one billion, two hundred twenty-five million, fifty-six thousand, one hundred twenty-one".