21301012037 has 2 divisors, whose sum is σ = 21301012038. Its totient is φ = 21301012036.

The previous prime is 21301012027. The next prime is 21301012063. The reversal of 21301012037 is 73021010312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20268932161 + 1032079876 = 142369^2 + 32126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21301012037 is a prime.

It is a super-2 number, since 2×21301012037² (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 (21301012027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10650506018 + 10650506019.

It is an arithmetic number, because the mean of its divisors is an integer number (10650506019).

Almost surely, 2^21301012037 is an apocalyptic number.

It is an amenable number.

21301012037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21301012037 is an equidigital number, since it uses as much as digits as its factorization.

21301012037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

Adding to 21301012037 its reverse (73021010312), we get a palindrome (94322022349).

The spelling of 21301012037 in words is "twenty-one billion, three hundred one million, twelve thousand, thirty-seven".