21133133031 has 16 divisors (see below), whose sum is σ = 28580947200. Its totient is φ = 13887128640.

The previous prime is 21133133017. The next prime is 21133133053. The reversal of 21133133031 is 13033133112.

It is not a de Polignac number, because 21133133031 - 2¹⁸ = 21132870887 is a prime.

It is a super-2 number, since 2×21133133031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21133132989 and 21133133007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133133071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1237356 + ... + 1254318.

It is an arithmetic number, because the mean of its divisors is an integer number (1786309200).

Almost surely, 2^21133133031 is an apocalyptic number.

21133133031 is a deficient number, since it is larger than the sum of its proper divisors (7447814169).

21133133031 is a wasteful number, since it uses less digits than its factorization.

21133133031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22886.

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

Adding to 21133133031 its reverse (13033133112), we get a palindrome (34166266143).

The spelling of 21133133031 in words is "twenty-one billion, one hundred thirty-three million, one hundred thirty-three thousand, thirty-one".