21301122311 has 16 divisors (see below), whose sum is σ = 25193203200. Its totient is φ = 17621788128.

The previous prime is 21301122307. The next prime is 21301122313. The reversal of 21301122311 is 11322110312.

It is not a de Polignac number, because 21301122311 - 2² = 21301122307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21301122311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301122313) 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, 553646 + ... + 590868.

It is an arithmetic number, because the mean of its divisors is an integer number (1574575200).

Almost surely, 2^21301122311 is an apocalyptic number.

21301122311 is a deficient number, since it is larger than the sum of its proper divisors (3892080889).

21301122311 is a wasteful number, since it uses less digits than its factorization.

21301122311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40078.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21301122311 its reverse (11322110312), we get a palindrome (32623232623).

The spelling of 21301122311 in words is "twenty-one billion, three hundred one million, one hundred twenty-two thousand, three hundred eleven".