21302012201311 has 4 divisors (see below), whose sum is σ = 21302146351224. Its totient is φ = 21301878051400.

The previous prime is 21302012201231. The next prime is 21302012201359. The reversal of 21302012201311 is 11310221020312.

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

It is a cyclic number.

It is not a de Polignac number, because 21302012201311 - 2¹⁷ = 21302012070239 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 (21302012201381) 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, 66836485 + ... + 67154446.

It is an arithmetic number, because the mean of its divisors is an integer number (5325536587806).

Almost surely, 2^{21302012201311} is an apocalyptic number.

21302012201311 is a deficient number, since it is larger than the sum of its proper divisors (134149913).

21302012201311 is a wasteful number, since it uses less digits than its factorization.

21302012201311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134149912.

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

Adding to 21302012201311 its reverse (11310221020312), we get a palindrome (32612233221623).

The spelling of 21302012201311 in words is "twenty-one trillion, three hundred two billion, twelve million, two hundred one thousand, three hundred eleven".