21333101331 has 16 divisors (see below), whose sum is σ = 29055297024. Its totient is φ = 13916611104.

The previous prime is 21333101327. The next prime is 21333101357. The reversal of 21333101331 is 13310133312.

It is not a de Polignac number, because 21333101331 - 2² = 21333101327 is a prime.

It is a super-2 number, since 2×21333101331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21333101298 and 21333101307.

It is not an unprimeable number, because it can be changed into a prime (21333101131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 839545 + ... + 864581.

It is an arithmetic number, because the mean of its divisors is an integer number (1815956064).

Almost surely, 2^21333101331 is an apocalyptic number.

21333101331 is a deficient number, since it is larger than the sum of its proper divisors (7722195693).

21333101331 is a wasteful number, since it uses less digits than its factorization.

21333101331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31130.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 21333101331 its reverse (13310133312), we get a palindrome (34643234643).

The spelling of 21333101331 in words is "twenty-one billion, three hundred thirty-three million, one hundred one thousand, three hundred thirty-one".