21232031101 has 16 divisors (see below), whose sum is σ = 22279795200. Its totient is φ = 20194894720.

The previous prime is 21232031081. The next prime is 21232031113. The reversal of 21232031101 is 10113023212.

It is a cyclic number.

It is not a de Polignac number, because 21232031101 - 2⁷ = 21232030973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232031801) 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, 4879875 + ... + 4884223.

It is an arithmetic number, because the mean of its divisors is an integer number (1392487200).

Almost surely, 2^21232031101 is an apocalyptic number.

It is an amenable number.

21232031101 is a deficient number, since it is larger than the sum of its proper divisors (1047764099).

21232031101 is a wasteful number, since it uses less digits than its factorization.

21232031101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5516.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21232031101 its reverse (10113023212), we get a palindrome (31345054313).

The spelling of 21232031101 in words is "twenty-one billion, two hundred thirty-two million, thirty-one thousand, one hundred one".