21130332331 has 8 divisors (see below), whose sum is σ = 21727886544. Its totient is φ = 20534171040.

The previous prime is 21130332259. The next prime is 21130332343. The reversal of 21130332331 is 13323303112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21130332331 - 2⁹ = 21130331819 is a prime.

It is a super-2 number, since 2×21130332331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130333331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 317425 + ... + 378178.

It is an arithmetic number, because the mean of its divisors is an integer number (2715985818).

Almost surely, 2^21130332331 is an apocalyptic number.

21130332331 is a deficient number, since it is larger than the sum of its proper divisors (597554213).

21130332331 is an equidigital number, since it uses as much as digits as its factorization.

21130332331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696461.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21130332331 its reverse (13323303112), we get a palindrome (34453635443).

The spelling of 21130332331 in words is "twenty-one billion, one hundred thirty million, three hundred thirty-two thousand, three hundred thirty-one".