21302013310231 has 2 divisors, whose sum is σ = 21302013310232. Its totient is φ = 21302013310230.

The previous prime is 21302013310223. The next prime is 21302013310241. The reversal of 21302013310231 is 13201331020312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21302013310231 - 2³ = 21302013310223 is a prime.

It is a super-2 number, since 2×21302013310231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21302013310241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651006655115 + 10651006655116.

It is an arithmetic number, because the mean of its divisors is an integer number (10651006655116).

Almost surely, 2^{21302013310231} is an apocalyptic number.

21302013310231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302013310231 is an equidigital number, since it uses as much as digits as its factorization.

21302013310231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21302013310231 its reverse (13201331020312), we get a palindrome (34503344330543).

The spelling of 21302013310231 in words is "twenty-one trillion, three hundred two billion, thirteen million, three hundred ten thousand, two hundred thirty-one".