21311110201 has 16 divisors (see below), whose sum is σ = 23272243200. Its totient is φ = 19437884928.

The previous prime is 21311110147. The next prime is 21311110211. The reversal of 21311110201 is 10201111312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21311110201 - 2¹⁵ = 21311077433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21311110211) 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, 139720 + ... + 249286.

It is an arithmetic number, because the mean of its divisors is an integer number (1454515200).

Almost surely, 2^21311110201 is an apocalyptic number.

It is an amenable number.

21311110201 is a deficient number, since it is larger than the sum of its proper divisors (1961132999).

21311110201 is a wasteful number, since it uses less digits than its factorization.

21311110201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109968.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21311110201 its reverse (10201111312), we get a palindrome (31512221513).

The spelling of 21311110201 in words is "twenty-one billion, three hundred eleven million, one hundred ten thousand, two hundred one".