21333300331 has 16 divisors (see below), whose sum is σ = 25522818048. Its totient is φ = 17434375200.

The previous prime is 21333300283. The next prime is 21333300347. The reversal of 21333300331 is 13300333312.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21333300331 is a prime.

It is a super-2 number, since 2×21333300331² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21333306331) 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, 162960 + ... + 263101.

It is an arithmetic number, because the mean of its divisors is an integer number (1595176128).

Almost surely, 2^21333300331 is an apocalyptic number.

21333300331 is a deficient number, since it is larger than the sum of its proper divisors (4189517717).

21333300331 is a wasteful number, since it uses less digits than its factorization.

21333300331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426402.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 21333300331 its reverse (13300333312), we get a palindrome (34633633643).

The spelling of 21333300331 in words is "twenty-one billion, three hundred thirty-three million, three hundred thousand, three hundred thirty-one".