21311222222313 has 24 divisors (see below), whose sum is σ = 32123509584192. Its totient is φ = 13588814197728.

The previous prime is 21311222222293. The next prime is 21311222222369. The reversal of 21311222222313 is 31322222211312.

21311222222313 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 122 + 2 + 222 + 313 = 666.

It is not a de Polignac number, because 21311222222313 - 2⁹ = 21311222221801 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21311222222413) 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, 629106 + ... + 6558827.

It is an arithmetic number, because the mean of its divisors is an integer number (1338479566008).

Almost surely, 2^{21311222222313} is an apocalyptic number.

21311222222313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21311222222313 is a deficient number, since it is larger than the sum of its proper divisors (10812287361879).

21311222222313 is a wasteful number, since it uses less digits than its factorization.

21311222222313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202285 (or 7202282 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

Adding to 21311222222313 its reverse (31322222211312), we get a palindrome (52633444433625).

The spelling of 21311222222313 in words is "twenty-one trillion, three hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, three hundred thirteen".