21103022331311 has 16 divisors (see below), whose sum is σ = 23319001151424. Its totient is φ = 18995566977024.

The previous prime is 21103022331289. The next prime is 21103022331329. The reversal of 21103022331311 is 11313322030112.

It is a cyclic number.

It is not a de Polignac number, because 21103022331311 - 2¹⁸ = 21103022069167 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103022331371) 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, 703190 + ... + 6534563.

It is an arithmetic number, because the mean of its divisors is an integer number (1457437571964).

Almost surely, 2^{21103022331311} is an apocalyptic number.

21103022331311 is a deficient number, since it is larger than the sum of its proper divisors (2215978820113).

21103022331311 is a wasteful number, since it uses less digits than its factorization.

21103022331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7245250.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21103022331311 its reverse (11313322030112), we get a palindrome (32416344361423).

The spelling of 21103022331311 in words is "twenty-one trillion, one hundred three billion, twenty-two million, three hundred thirty-one thousand, three hundred eleven".