21110320202331 has 24 divisors (see below), whose sum is σ = 29778595672896. Its totient is φ = 13299464783440.

The previous prime is 21110320202291. The next prime is 21110320202351. The reversal of 21110320202331 is 13320202301112.

It is not a de Polignac number, because 21110320202331 - 2⁴¹ = 18911296946779 is a prime.

It is a super-2 number, since 2×21110320202331² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21110320202298 and 21110320202307.

It is not an unprimeable number, because it can be changed into a prime (21110320202351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80000985 + ... + 80264426.

It is an arithmetic number, because the mean of its divisors is an integer number (1240774819704).

Almost surely, 2^{21110320202331} is an apocalyptic number.

21110320202331 is a deficient number, since it is larger than the sum of its proper divisors (8668275470565).

21110320202331 is a wasteful number, since it uses less digits than its factorization.

21110320202331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160265543 (or 160265520 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21110320202331 its reverse (13320202301112), we get a palindrome (34430522503443).

The spelling of 21110320202331 in words is "twenty-one trillion, one hundred ten billion, three hundred twenty million, two hundred two thousand, three hundred thirty-one".