21131233101 has 48 divisors (see below), whose sum is σ = 34563372480. Its totient is φ = 12794785920.

The previous prime is 21131233069. The next prime is 21131233157. The reversal of 21131233101 is 10133213112.

21131233101 is a `hidden beast` number, since 21 + 1 + 312 + 331 + 0 + 1 = 666.

It is not a de Polignac number, because 21131233101 - 2⁵ = 21131233069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131233181) 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 47 ways as a sum of consecutive naturals, for example, 3442431 + ... + 3448563.

It is an arithmetic number, because the mean of its divisors is an integer number (720070260).

Almost surely, 2^21131233101 is an apocalyptic number.

It is an amenable number.

21131233101 is a deficient number, since it is larger than the sum of its proper divisors (13432139379).

21131233101 is a wasteful number, since it uses less digits than its factorization.

21131233101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7448 (or 7436 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21131233101 its reverse (10133213112), we get a palindrome (31264446213).

The spelling of 21131233101 in words is "twenty-one billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred one".