21022132331 has 8 divisors (see below), whose sum is σ = 21833401344. Its totient is φ = 20219184360.

The previous prime is 21022132309. The next prime is 21022132333. The reversal of 21022132331 is 13323122012.

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 21022132331 - 2¹⁸ = 21021870187 is a prime.

It is a super-2 number, since 2×21022132331² (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 (21022132333) 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, 2075111 + ... + 2085216.

It is an arithmetic number, because the mean of its divisors is an integer number (2729175168).

Almost surely, 2^21022132331 is an apocalyptic number.

21022132331 is a deficient number, since it is larger than the sum of its proper divisors (811269013).

21022132331 is a wasteful number, since it uses less digits than its factorization.

21022132331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4160521.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21022132331 its reverse (13323122012), we get a palindrome (34345254343).

The spelling of 21022132331 in words is "twenty-one billion, twenty-two million, one hundred thirty-two thousand, three hundred thirty-one".