21022332331 has 24 divisors (see below), whose sum is σ = 28380893184. Its totient is φ = 15120948960.

The previous prime is 21022332329. The next prime is 21022332337. The reversal of 21022332331 is 13323322012.

It is not a de Polignac number, because 21022332331 - 2¹ = 21022332329 is a prime.

It is a super-2 number, since 2×21022332331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21022332337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 794731 + ... + 820756.

It is an arithmetic number, because the mean of its divisors is an integer number (1182537216).

Almost surely, 2^21022332331 is an apocalyptic number.

21022332331 is a deficient number, since it is larger than the sum of its proper divisors (7358560853).

21022332331 is a wasteful number, since it uses less digits than its factorization.

21022332331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615531 (or 1615518 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21022332331 its reverse (13323322012), we get a palindrome (34345654343).

It can be divided in two parts, 21022 and 332331, that added together give a palindrome (353353).

The spelling of 21022332331 in words is "twenty-one billion, twenty-two million, three hundred thirty-two thousand, three hundred thirty-one".