21233301331 has 16 divisors (see below), whose sum is σ = 23654695680. Its totient is φ = 18895425120.

The previous prime is 21233301329. The next prime is 21233301361. The reversal of 21233301331 is 13310333212.

It is not a de Polignac number, because 21233301331 - 2¹ = 21233301329 is a prime.

It is a super-2 number, since 2×21233301331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21233301361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214456 + ... + 297418.

It is an arithmetic number, because the mean of its divisors is an integer number (1478418480).

Almost surely, 2^21233301331 is an apocalyptic number.

21233301331 is a deficient number, since it is larger than the sum of its proper divisors (2421394349).

21233301331 is a wasteful number, since it uses less digits than its factorization.

21233301331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83466.

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

Adding to 21233301331 its reverse (13310333212), we get a palindrome (34543634543).

The spelling of 21233301331 in words is "twenty-one billion, two hundred thirty-three million, three hundred one thousand, three hundred thirty-one".