123213213311 has 4 divisors (see below), whose sum is σ = 123219909624. Its totient is φ = 123206517000.

The previous prime is 123213213307. The next prime is 123213213329. The reversal of 123213213311 is 113312312321.

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 123213213311 - 2² = 123213213307 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 (123203213311) 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, 3320480 + ... + 3357381.

It is an arithmetic number, because the mean of its divisors is an integer number (30804977406).

Almost surely, 2^123213213311 is an apocalyptic number.

123213213311 is a deficient number, since it is larger than the sum of its proper divisors (6696313).

123213213311 is an equidigital number, since it uses as much as digits as its factorization.

123213213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6696312.

The product of its digits is 648, while the sum is 23.

Adding to 123213213311 its reverse (113312312321), we get a palindrome (236525525632).

The spelling of 123213213311 in words is "one hundred twenty-three billion, two hundred thirteen million, two hundred thirteen thousand, three hundred eleven".