21313102212331 has 4 divisors (see below), whose sum is σ = 22566814107192. Its totient is φ = 20059390317472.

The previous prime is 21313102212329. The next prime is 21313102212383. The reversal of 21313102212331 is 13321220131312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21313102212331 - 2¹ = 21313102212329 is a prime.

It is a super-2 number, since 2×21313102212331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21313102212296 and 21313102212305.

It is not an unprimeable number, because it can be changed into a prime (21313102012331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 626855947405 + ... + 626855947438.

It is an arithmetic number, because the mean of its divisors is an integer number (5641703526798).

Almost surely, 2^{21313102212331} is an apocalyptic number.

21313102212331 is a deficient number, since it is larger than the sum of its proper divisors (1253711894861).

21313102212331 is a wasteful number, since it uses less digits than its factorization.

21313102212331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253711894860.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 21313102212331 its reverse (13321220131312), we get a palindrome (34634322343643).

The spelling of 21313102212331 in words is "twenty-one trillion, three hundred thirteen billion, one hundred two million, two hundred twelve thousand, three hundred thirty-one".