21231331110323 has 16 divisors (see below), whose sum is σ = 22570250228064. Its totient is φ = 19902520711680.

The previous prime is 21231331110293. The next prime is 21231331110349. The reversal of 21231331110323 is 32301113313212.

It is a cyclic number.

It is not a de Polignac number, because 21231331110323 - 2¹⁸ = 21231330848179 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21231331110292 and 21231331110301.

It is not an unprimeable number, because it can be changed into a prime (21231331110023) 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, 4696436 + ... + 8032382.

It is an arithmetic number, because the mean of its divisors is an integer number (1410640639254).

Almost surely, 2^{21231331110323} is an apocalyptic number.

21231331110323 is a deficient number, since it is larger than the sum of its proper divisors (1338919117741).

21231331110323 is a wasteful number, since it uses less digits than its factorization.

21231331110323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3337462.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21231331110323 its reverse (32301113313212), we get a palindrome (53532444423535).

The spelling of 21231331110323 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred thirty-one million, one hundred ten thousand, three hundred twenty-three".