213423120311 has 4 divisors (see below), whose sum is σ = 216429079824. Its totient is φ = 210417160800.

The previous prime is 213423120299. The next prime is 213423120329. The reversal of 213423120311 is 113021324312.

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-213423120311 is a prime.

It is a super-3 number, since 3×213423120311³ (a number of 35 digits) contains 333 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 (213423120511) 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, 1502979650 + ... + 1502979791.

It is an arithmetic number, because the mean of its divisors is an integer number (54107269956).

Almost surely, 2^213423120311 is an apocalyptic number.

213423120311 is a deficient number, since it is larger than the sum of its proper divisors (3005959513).

213423120311 is an equidigital number, since it uses as much as digits as its factorization.

213423120311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3005959512.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 213423120311 its reverse (113021324312), we get a palindrome (326444444623).

The spelling of 213423120311 in words is "two hundred thirteen billion, four hundred twenty-three million, one hundred twenty thousand, three hundred eleven".