21313119283637 has 2 divisors, whose sum is σ = 21313119283638. Its totient is φ = 21313119283636.

The previous prime is 21313119283597. The next prime is 21313119283639. The reversal of 21313119283637 is 73638291131312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21234760718161 + 78358565476 = 4608119^2 + 279926^2 .

It is a cyclic number.

It is not a de Polignac number, because 21313119283637 - 2²⁶ = 21313052174773 is a prime.

Together with 21313119283639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21313119283639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656559641818 + 10656559641819.

It is an arithmetic number, because the mean of its divisors is an integer number (10656559641819).

Almost surely, 2^{21313119283637} is an apocalyptic number.

It is an amenable number.

21313119283637 is a deficient number, since it is larger than the sum of its proper divisors (1).

21313119283637 is an equidigital number, since it uses as much as digits as its factorization.

21313119283637 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21313119283637 in words is "twenty-one trillion, three hundred thirteen billion, one hundred nineteen million, two hundred eighty-three thousand, six hundred thirty-seven".