21231000112311 has 16 divisors (see below), whose sum is σ = 34312727454720. Its totient is φ = 12867272795160.

The previous prime is 21231000112277. The next prime is 21231000112331. The reversal of 21231000112311 is 11321100013212.

21231000112311 is a `hidden beast` number, since 212 + 31 + 0 + 0 + 0 + 112 + 311 = 666.

It is not a de Polignac number, because 21231000112311 - 2⁶ = 21231000112247 is a prime.

It is a super-2 number, since 2×21231000112311² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231000112331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35742424135 + ... + 35742424728.

It is an arithmetic number, because the mean of its divisors is an integer number (2144545465920).

Almost surely, 2^{21231000112311} is an apocalyptic number.

21231000112311 is a deficient number, since it is larger than the sum of its proper divisors (13081727342409).

21231000112311 is a wasteful number, since it uses less digits than its factorization.

21231000112311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71484848883 (or 71484848877 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21231000112311 its reverse (11321100013212), we get a palindrome (32552100125523).

Subtracting from 21231000112311 its reverse (11321100013212), we obtain a palindrome (9909900099099).

It can be divided in two parts, 21231000 and 112311, that added together give a triangular number (21343311 = T₆₅₃₃).

The spelling of 21231000112311 in words is "twenty-one trillion, two hundred thirty-one billion, one hundred twelve thousand, three hundred eleven".