21310051319 has 2 divisors, whose sum is σ = 21310051320. Its totient is φ = 21310051318.

The previous prime is 21310051313. The next prime is 21310051339. The reversal of 21310051319 is 91315001312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21310051319 - 2¹² = 21310047223 is a prime.

It is a super-2 number, since 2×21310051319² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21310051313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655025659 + 10655025660.

It is an arithmetic number, because the mean of its divisors is an integer number (10655025660).

Almost surely, 2^21310051319 is an apocalyptic number.

21310051319 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310051319 is an equidigital number, since it uses as much as digits as its factorization.

21310051319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 26.

The spelling of 21310051319 in words is "twenty-one billion, three hundred ten million, fifty-one thousand, three hundred nineteen".