21310014137 has 2 divisors, whose sum is σ = 21310014138. Its totient is φ = 21310014136.

The previous prime is 21310014127. The next prime is 21310014157. The reversal of 21310014137 is 73141001312.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15096791161 + 6213222976 = 122869^2 + 78824^2 .

It is a cyclic number.

It is not a de Polignac number, because 21310014137 - 2¹⁰ = 21310013113 is a prime.

It is not a weakly prime, because it can be changed into another prime (21310014127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655007068 + 10655007069.

It is an arithmetic number, because the mean of its divisors is an integer number (10655007069).

Almost surely, 2^21310014137 is an apocalyptic number.

It is an amenable number.

21310014137 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310014137 is an equidigital number, since it uses as much as digits as its factorization.

21310014137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

Adding to 21310014137 its reverse (73141001312), we get a palindrome (94451015449).

The spelling of 21310014137 in words is "twenty-one billion, three hundred ten million, fourteen thousand, one hundred thirty-seven".