21201301311 has 32 divisors (see below), whose sum is σ = 28924262400. Its totient is φ = 13810214880.

The previous prime is 21201301283. The next prime is 21201301313. The reversal of 21201301311 is 11310310212.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-21201301311 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201301313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16073110 + ... + 16074428.

It is an arithmetic number, because the mean of its divisors is an integer number (903883200).

Almost surely, 2^21201301311 is an apocalyptic number.

21201301311 is a deficient number, since it is larger than the sum of its proper divisors (7722961089).

21201301311 is a wasteful number, since it uses less digits than its factorization.

21201301311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1979.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21201301311 its reverse (11310310212), we get a palindrome (32511611523).

The spelling of 21201301311 in words is "twenty-one billion, two hundred one million, three hundred one thousand, three hundred eleven".