21023131233101 has 4 divisors (see below), whose sum is σ = 21023188102752. Its totient is φ = 21023074363452.

The previous prime is 21023131233053. The next prime is 21023131233103. The reversal of 21023131233101 is 10133213132012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21023131233101 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 (21023131233103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27876665 + ... + 28620878.

It is an arithmetic number, because the mean of its divisors is an integer number (5255797025688).

Almost surely, 2^{21023131233101} is an apocalyptic number.

It is an amenable number.

21023131233101 is a deficient number, since it is larger than the sum of its proper divisors (56869651).

21023131233101 is an equidigital number, since it uses as much as digits as its factorization.

21023131233101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56869650.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21023131233101 its reverse (10133213132012), we get a palindrome (31156344365113).

The spelling of 21023131233101 in words is "twenty-one trillion, twenty-three billion, one hundred thirty-one million, two hundred thirty-three thousand, one hundred one".