2151504622121 has 2 divisors, whose sum is σ = 2151504622122. Its totient is φ = 2151504622120.

The previous prime is 2151504622103. The next prime is 2151504622133. The reversal of 2151504622121 is 1212264051512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1909755399721 + 241749222400 = 1381939^2 + 491680^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151504622121 is a prime.

It is not a weakly prime, because it can be changed into another prime (2151504622181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075752311060 + 1075752311061.

It is an arithmetic number, because the mean of its divisors is an integer number (1075752311061).

Almost surely, 2^{2151504622121} is an apocalyptic number.

It is an amenable number.

2151504622121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151504622121 is an equidigital number, since it uses as much as digits as its factorization.

2151504622121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

Adding to 2151504622121 its reverse (1212264051512), we get a palindrome (3363768673633).

The spelling of 2151504622121 in words is "two trillion, one hundred fifty-one billion, five hundred four million, six hundred twenty-two thousand, one hundred twenty-one".