21312033112311 has 4 divisors (see below), whose sum is σ = 28416044149752. Its totient is φ = 14208022074872.

The previous prime is 21312033112309. The next prime is 21312033112343. The reversal of 21312033112311 is 11321133021312.

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 21312033112311 - 2¹ = 21312033112309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312033112361) 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, 3552005518716 + ... + 3552005518721.

It is an arithmetic number, because the mean of its divisors is an integer number (7104011037438).

Almost surely, 2^{21312033112311} is an apocalyptic number.

21312033112311 is a deficient number, since it is larger than the sum of its proper divisors (7104011037441).

21312033112311 is an equidigital number, since it uses as much as digits as its factorization.

21312033112311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7104011037440.

The product of its (nonzero) digits is 648, while the sum is 24.

Adding to 21312033112311 its reverse (11321133021312), we get a palindrome (32633166133623).

Subtracting from 21312033112311 its reverse (11321133021312), we obtain a palindrome (9990900090999).

The spelling of 21312033112311 in words is "twenty-one trillion, three hundred twelve billion, thirty-three million, one hundred twelve thousand, three hundred eleven".