213212220311 has 4 divisors (see below), whose sum is σ = 215204857992. Its totient is φ = 211219582632.

The previous prime is 213212220289. The next prime is 213212220313. The reversal of 213212220311 is 113022212312.

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 213212220311 - 2²⁶ = 213145111447 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 (213212220313) 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, 996318680 + ... + 996318893.

It is an arithmetic number, because the mean of its divisors is an integer number (53801214498).

Almost surely, 2^213212220311 is an apocalyptic number.

213212220311 is a deficient number, since it is larger than the sum of its proper divisors (1992637681).

213212220311 is a wasteful number, since it uses less digits than its factorization.

213212220311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1992637680.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 213212220311 its reverse (113022212312), we get a palindrome (326234432623).

The spelling of 213212220311 in words is "two hundred thirteen billion, two hundred twelve million, two hundred twenty thousand, three hundred eleven".