21310202201311 has 4 divisors (see below), whose sum is σ = 21342836508552. Its totient is φ = 21277567894072.

The previous prime is 21310202201243. The next prime is 21310202201369. The reversal of 21310202201311 is 11310220201312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21310202201311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310202204311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16317152641 + ... + 16317153946.

It is an arithmetic number, because the mean of its divisors is an integer number (5335709127138).

Almost surely, 2^{21310202201311} is an apocalyptic number.

21310202201311 is a deficient number, since it is larger than the sum of its proper divisors (32634307241).

21310202201311 is an equidigital number, since it uses as much as digits as its factorization.

21310202201311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32634307240.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21310202201311 its reverse (11310220201312), we get a palindrome (32620422402623).

The spelling of 21310202201311 in words is "twenty-one trillion, three hundred ten billion, two hundred two million, two hundred one thousand, three hundred eleven".