20321123021311 has 16 divisors (see below), whose sum is σ = 23237710816320. Its totient is φ = 17407928816640.

The previous prime is 20321123021281. The next prime is 20321123021321. The reversal of 20321123021311 is 11312032112302.

It is a cyclic number.

It is not a de Polignac number, because 20321123021311 - 2⁷ = 20321123021183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20321123021321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351663241 + ... + 351721021.

It is an arithmetic number, because the mean of its divisors is an integer number (1452356926020).

Almost surely, 2^{20321123021311} is an apocalyptic number.

20321123021311 is a deficient number, since it is larger than the sum of its proper divisors (2916587795009).

20321123021311 is a wasteful number, since it uses less digits than its factorization.

20321123021311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86274.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 20321123021311 its reverse (11312032112302), we get a palindrome (31633155133613).

Subtracting from 20321123021311 its reverse (11312032112302), we obtain a palindrome (9009090909009).

The spelling of 20321123021311 in words is "twenty trillion, three hundred twenty-one billion, one hundred twenty-three million, twenty-one thousand, three hundred eleven".