21597732119287 has 2 divisors, whose sum is σ = 21597732119288. Its totient is φ = 21597732119286.

The previous prime is 21597732119237. The next prime is 21597732119291. The reversal of 21597732119287 is 78291123779512.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21597732119287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21597732119237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10798866059643 + 10798866059644.

It is an arithmetic number, because the mean of its divisors is an integer number (10798866059644).

Almost surely, 2^{21597732119287} is an apocalyptic number.

21597732119287 is a deficient number, since it is larger than the sum of its proper divisors (1).

21597732119287 is an equidigital number, since it uses as much as digits as its factorization.

21597732119287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26671680, while the sum is 64.

The spelling of 21597732119287 in words is "twenty-one trillion, five hundred ninety-seven billion, seven hundred thirty-two million, one hundred nineteen thousand, two hundred eighty-seven".