21023210133 has 12 divisors (see below), whose sum is σ = 30525850368. Its totient is φ = 13942092840.

The previous prime is 21023210113. The next prime is 21023210141. The reversal of 21023210133 is 33101232012.

21023210133 is a `hidden beast` number, since 210 + 2 + 321 + 0 + 133 = 666.

It is not a de Polignac number, because 21023210133 - 2⁵ = 21023210101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21023210113) 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 11 ways as a sum of consecutive naturals, for example, 6113235 + ... + 6116672.

It is an arithmetic number, because the mean of its divisors is an integer number (2543820864).

Almost surely, 2^21023210133 is an apocalyptic number.

It is an amenable number.

21023210133 is a deficient number, since it is larger than the sum of its proper divisors (9502640235).

21023210133 is a wasteful number, since it uses less digits than its factorization.

21023210133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12230104 (or 12230101 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023210133 its reverse (33101232012), we get a palindrome (54124442145).

The spelling of 21023210133 in words is "twenty-one billion, twenty-three million, two hundred ten thousand, one hundred thirty-three".