21163132024997 has 2 divisors, whose sum is σ = 21163132024998. Its totient is φ = 21163132024996.

The previous prime is 21163132024889. The next prime is 21163132025011. The reversal of 21163132024997 is 79942023136112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18393067773796 + 2770064251201 = 4288714^2 + 1664351^2 .

It is a cyclic number.

It is not a de Polignac number, because 21163132024997 - 2¹⁰ = 21163132023973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21163132024597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581566012498 + 10581566012499.

It is an arithmetic number, because the mean of its divisors is an integer number (10581566012499).

Almost surely, 2^{21163132024997} is an apocalyptic number.

It is an amenable number.

21163132024997 is a deficient number, since it is larger than the sum of its proper divisors (1).

21163132024997 is an equidigital number, since it uses as much as digits as its factorization.

21163132024997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 50.

The spelling of 21163132024997 in words is "twenty-one trillion, one hundred sixty-three billion, one hundred thirty-two million, twenty-four thousand, nine hundred ninety-seven".