213322120231 has 4 divisors (see below), whose sum is σ = 232715040264. Its totient is φ = 193929200200.

The previous prime is 213322120217. The next prime is 213322120267. The reversal of 213322120231 is 132021223312.

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 213322120231 - 2⁹ = 213322119719 is a prime.

It is a super-2 number, since 2×213322120231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213322100231) 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, 9696460000 + ... + 9696460021.

It is an arithmetic number, because the mean of its divisors is an integer number (58178760066).

Almost surely, 2^213322120231 is an apocalyptic number.

213322120231 is a deficient number, since it is larger than the sum of its proper divisors (19392920033).

213322120231 is a wasteful number, since it uses less digits than its factorization.

213322120231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19392920032.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 213322120231 its reverse (132021223312), we get a palindrome (345343343543).

The spelling of 213322120231 in words is "two hundred thirteen billion, three hundred twenty-two million, one hundred twenty thousand, two hundred thirty-one".