21514044011651 has 2 divisors, whose sum is σ = 21514044011652. Its totient is φ = 21514044011650.

The previous prime is 21514044011597. The next prime is 21514044011711. The reversal of 21514044011651 is 15611044041512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21514044011651 - 2¹⁴ = 21514043995267 is a prime.

It is not a weakly prime, because it can be changed into another prime (21514044071651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10757022005825 + 10757022005826.

It is an arithmetic number, because the mean of its divisors is an integer number (10757022005826).

Almost surely, 2^{21514044011651} is an apocalyptic number.

21514044011651 is a deficient number, since it is larger than the sum of its proper divisors (1).

21514044011651 is an equidigital number, since it uses as much as digits as its factorization.

21514044011651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19200, while the sum is 35.

The spelling of 21514044011651 in words is "twenty-one trillion, five hundred fourteen billion, forty-four million, eleven thousand, six hundred fifty-one".