21275814760751 has 2 divisors, whose sum is σ = 21275814760752. Its totient is φ = 21275814760750.

The previous prime is 21275814760643. The next prime is 21275814760787. The reversal of 21275814760751 is 15706741857212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21275814760751 - 2³⁸ = 21000936853807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21275814760451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10637907380375 + 10637907380376.

It is an arithmetic number, because the mean of its divisors is an integer number (10637907380376).

Almost surely, 2^{21275814760751} is an apocalyptic number.

21275814760751 is a deficient number, since it is larger than the sum of its proper divisors (1).

21275814760751 is an equidigital number, since it uses as much as digits as its factorization.

21275814760751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6585600, while the sum is 56.

The spelling of 21275814760751 in words is "twenty-one trillion, two hundred seventy-five billion, eight hundred fourteen million, seven hundred sixty thousand, seven hundred fifty-one".