21320132113 has 12 divisors (see below), whose sum is σ = 24843985572. Its totient is φ = 18242703360.

The previous prime is 21320132059. The next prime is 21320132131. The reversal of 21320132113 is 31123102312.

It can be written as a sum of positive squares in 2 ways, for example, as 12358101889 + 8962030224 = 111167^2 + 94668^2 .

It is not a de Polignac number, because 21320132113 - 2¹³ = 21320123921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320132153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 348768 + ... + 405313.

It is an arithmetic number, because the mean of its divisors is an integer number (2070332131).

Almost surely, 2^21320132113 is an apocalyptic number.

It is an amenable number.

21320132113 is a deficient number, since it is larger than the sum of its proper divisors (3523853459).

21320132113 is an equidigital number, since it uses as much as digits as its factorization.

21320132113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 754672 (or 754665 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21320132113 its reverse (31123102312), we get a palindrome (52443234425).

The spelling of 21320132113 in words is "twenty-one billion, three hundred twenty million, one hundred thirty-two thousand, one hundred thirteen".