21332130913 has 2 divisors, whose sum is σ = 21332130914. Its totient is φ = 21332130912.

The previous prime is 21332130899. The next prime is 21332130943. The reversal of 21332130913 is 31903123312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20479899664 + 852231249 = 143108^2 + 29193^2 .

It is a cyclic number.

It is not a de Polignac number, because 21332130913 - 2¹⁷ = 21331999841 is a prime.

It is not a weakly prime, because it can be changed into another prime (21332130943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666065456 + 10666065457.

It is an arithmetic number, because the mean of its divisors is an integer number (10666065457).

Almost surely, 2^21332130913 is an apocalyptic number.

It is an amenable number.

21332130913 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332130913 is an equidigital number, since it uses as much as digits as its factorization.

21332130913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The spelling of 21332130913 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty thousand, nine hundred thirteen".