21311321302311 has 32 divisors (see below), whose sum is σ = 30142410439680. Its totient is φ = 13366166880000.

The previous prime is 21311321302291. The next prime is 21311321302339. The reversal of 21311321302311 is 11320312311312.

It is not a de Polignac number, because 21311321302311 - 2¹⁹ = 21311320778023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311321302511) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9073566 + ... + 11178203.

It is an arithmetic number, because the mean of its divisors is an integer number (941950326240).

Almost surely, 2^{21311321302311} is an apocalyptic number.

21311321302311 is a deficient number, since it is larger than the sum of its proper divisors (8831089137369).

21311321302311 is a wasteful number, since it uses less digits than its factorization.

21311321302311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20252047.

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

Adding to 21311321302311 its reverse (11320312311312), we get a palindrome (32631633613623).

The spelling of 21311321302311 in words is "twenty-one trillion, three hundred eleven billion, three hundred twenty-one million, three hundred two thousand, three hundred eleven".