21332210331 has 4 divisors (see below), whose sum is σ = 28442947112. Its totient is φ = 14221473552.

The previous prime is 21332210323. The next prime is 21332210359. The reversal of 21332210331 is 13301223312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21332210331 - 2³ = 21332210323 is a prime.

It is a super-2 number, since 2×21332210331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332210298 and 21332210307.

It is not an unprimeable number, because it can be changed into a prime (21332210371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3555368386 + ... + 3555368391.

It is an arithmetic number, because the mean of its divisors is an integer number (7110736778).

Almost surely, 2^21332210331 is an apocalyptic number.

21332210331 is a deficient number, since it is larger than the sum of its proper divisors (7110736781).

21332210331 is an equidigital number, since it uses as much as digits as its factorization.

21332210331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110736780.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21332210331 its reverse (13301223312), we get a palindrome (34633433643).

The spelling of 21332210331 in words is "twenty-one billion, three hundred thirty-two million, two hundred ten thousand, three hundred thirty-one".