21233231313311 has 4 divisors (see below), whose sum is σ = 21234052010592. Its totient is φ = 21232410616032.

The previous prime is 21233231313293. The next prime is 21233231313319. The reversal of 21233231313311 is 11331313233212.

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 21233231313311 - 2¹⁰ = 21233231312287 is a prime.

It is a super-2 number, since 2×21233231313311² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21233231313319) 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, 410309831 + ... + 410361576.

It is an arithmetic number, because the mean of its divisors is an integer number (5308513002648).

Almost surely, 2^{21233231313311} is an apocalyptic number.

21233231313311 is a deficient number, since it is larger than the sum of its proper divisors (820697281).

21233231313311 is an equidigital number, since it uses as much as digits as its factorization.

21233231313311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820697280.

The product of its digits is 5832, while the sum is 29.

Adding to 21233231313311 its reverse (11331313233212), we get a palindrome (32564544546523).

The spelling of 21233231313311 in words is "twenty-one trillion, two hundred thirty-three billion, two hundred thirty-one million, three hundred thirteen thousand, three hundred eleven".