21332111210231 has 4 divisors (see below), whose sum is σ = 22259594306352. Its totient is φ = 20404628114112.

The previous prime is 21332111210209. The next prime is 21332111210237. The reversal of 21332111210231 is 13201211123312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21332111210231 - 2¹⁰ = 21332111209207 is a prime.

It is a super-2 number, since 2×21332111210231² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 927483096097 = 21332111210231 / (2 + 1 + 3 + 3 + 2 + 1 + 1 + 1 + 2 + 1 + 0 + 2 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21332111210197 and 21332111210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21332111210237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 463741548026 + ... + 463741548071.

It is an arithmetic number, because the mean of its divisors is an integer number (5564898576588).

Almost surely, 2^{21332111210231} is an apocalyptic number.

21332111210231 is a deficient number, since it is larger than the sum of its proper divisors (927483096121).

21332111210231 is an equidigital number, since it uses as much as digits as its factorization.

21332111210231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 927483096120.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21332111210231 its reverse (13201211123312), we get a palindrome (34533322333543).

The spelling of 21332111210231 in words is "twenty-one trillion, three hundred thirty-two billion, one hundred eleven million, two hundred ten thousand, two hundred thirty-one".