21002342297 has 2 divisors, whose sum is σ = 21002342298. Its totient is φ = 21002342296.

The previous prime is 21002342293. The next prime is 21002342363. The reversal of 21002342297 is 79224320012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20762216281 + 240126016 = 144091^2 + 15496^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002342297 - 2² = 21002342293 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002342293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501171148 + 10501171149.

It is an arithmetic number, because the mean of its divisors is an integer number (10501171149).

Almost surely, 2^21002342297 is an apocalyptic number.

It is an amenable number.

21002342297 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002342297 is an equidigital number, since it uses as much as digits as its factorization.

21002342297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 21002342297 in words is "twenty-one billion, two million, three hundred forty-two thousand, two hundred ninety-seven".