2151350521321 has 2 divisors, whose sum is σ = 2151350521322. Its totient is φ = 2151350521320.

The previous prime is 2151350521319. The next prime is 2151350521361. The reversal of 2151350521321 is 1231250531512.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1413873196096 + 737477325225 = 1189064^2 + 858765^2 .

It is a cyclic number.

It is not a de Polignac number, because 2151350521321 - 2¹ = 2151350521319 is a prime.

Together with 2151350521319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2151350521361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1075675260660 + 1075675260661.

It is an arithmetic number, because the mean of its divisors is an integer number (1075675260661).

Almost surely, 2^{2151350521321} is an apocalyptic number.

It is an amenable number.

2151350521321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2151350521321 is an equidigital number, since it uses as much as digits as its factorization.

2151350521321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

The spelling of 2151350521321 in words is "two trillion, one hundred fifty-one billion, three hundred fifty million, five hundred twenty-one thousand, three hundred twenty-one".