21113232221331 has 8 divisors (see below), whose sum is σ = 31278862550160. Its totient is φ = 14075488147536.

The previous prime is 21113232221273. The next prime is 21113232221437. The reversal of 21113232221331 is 13312223231112.

21113232221331 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 3 + 2 + 322 + 2 + 1 + 331 = 666.

It is not a de Polignac number, because 21113232221331 - 2¹⁸ = 21113231959187 is a prime.

It is a super-2 number, since 2×21113232221331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 781971563753 = 21113232221331 / (2 + 1 + 1 + 1 + 3 + 2 + 3 + 2 + 2 + 2 + 1 + 3 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 21113232221295 and 21113232221304.

It is not an unprimeable number, because it can be changed into a prime (21113232291331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390985781850 + ... + 390985781903.

It is an arithmetic number, because the mean of its divisors is an integer number (3909857818770).

Almost surely, 2^{21113232221331} is an apocalyptic number.

21113232221331 is a deficient number, since it is larger than the sum of its proper divisors (10165630328829).

21113232221331 is an equidigital number, since it uses as much as digits as its factorization.

21113232221331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781971563762 (or 781971563756 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 21113232221331 its reverse (13312223231112), we get a palindrome (34425455452443).

The spelling of 21113232221331 in words is "twenty-one trillion, one hundred thirteen billion, two hundred thirty-two million, two hundred twenty-one thousand, three hundred thirty-one".