21302110597 has 2 divisors, whose sum is σ = 21302110598. Its totient is φ = 21302110596.

The previous prime is 21302110553. The next prime is 21302110601. The reversal of 21302110597 is 79501120312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21288560836 + 13549761 = 145906^2 + 3681^2 .

It is a cyclic number.

It is not a de Polignac number, because 21302110597 - 2⁷ = 21302110469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302170597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651055298 + 10651055299.

It is an arithmetic number, because the mean of its divisors is an integer number (10651055299).

Almost surely, 2^21302110597 is an apocalyptic number.

It is an amenable number.

21302110597 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302110597 is an equidigital number, since it uses as much as digits as its factorization.

21302110597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The spelling of 21302110597 in words is "twenty-one billion, three hundred two million, one hundred ten thousand, five hundred ninety-seven".