21312200311 has 8 divisors (see below), whose sum is σ = 22463088480. Its totient is φ = 20189044512.

The previous prime is 21312200291. The next prime is 21312200317. The reversal of 21312200311 is 11300221312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21312200311 - 2⁵ = 21312200279 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 (21312200317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6931515 + ... + 6934588.

It is an arithmetic number, because the mean of its divisors is an integer number (2807886060).

Almost surely, 2^21312200311 is an apocalyptic number.

21312200311 is a deficient number, since it is larger than the sum of its proper divisors (1150888169).

21312200311 is a wasteful number, since it uses less digits than its factorization.

21312200311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13866185.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21312200311 its reverse (11300221312), we get a palindrome (32612421623).

The spelling of 21312200311 in words is "twenty-one billion, three hundred twelve million, two hundred thousand, three hundred eleven".