21231331110311 has 12 divisors (see below), whose sum is σ = 24788806215840. Its totient is φ = 18131131458720.

The previous prime is 21231331110293. The next prime is 21231331110349. The reversal of 21231331110311 is 11301113313212.

It is not a de Polignac number, because 21231331110311 - 2⁶ = 21231331110247 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 (21231331110511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 799419326 + ... + 799445883.

It is an arithmetic number, because the mean of its divisors is an integer number (2065733851320).

Almost surely, 2^{21231331110311} is an apocalyptic number.

21231331110311 is a deficient number, since it is larger than the sum of its proper divisors (3557475105529).

21231331110311 is a wasteful number, since it uses less digits than its factorization.

21231331110311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598865494 (or 1598865487 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 21231331110311 its reverse (11301113313212), we get a palindrome (32532444423523).

The spelling of 21231331110311 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty-one million, one hundred ten thousand, three hundred eleven".