2151051512321 has 2 divisors, whose sum is σ = 2151051512322. Its totient is φ = 2151051512320.

The previous prime is 2151051512303. The next prime is 2151051512333. The reversal of 2151051512321 is 1232151501512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2121144652225 + 29906860096 = 1456415^2 + 172936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151051512321 is a prime.

It is a super-2 number, since 2×2151051512321² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2151051512381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075525756160 + 1075525756161.

It is an arithmetic number, because the mean of its divisors is an integer number (1075525756161).

Almost surely, 2^{2151051512321} is an apocalyptic number.

It is an amenable number.

2151051512321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151051512321 is an equidigital number, since it uses as much as digits as its factorization.

2151051512321 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2151051512321 in words is "two trillion, one hundred fifty-one billion, fifty-one million, five hundred twelve thousand, three hundred twenty-one".