311223123213 has 16 divisors (see below), whose sum is σ = 424899772416. Its totient is φ = 202537332080.

The previous prime is 311223123209. The next prime is 311223123227. The reversal of 311223123213 is 312321322113.

It is a cyclic number.

It is not a de Polignac number, because 311223123213 - 2² = 311223123209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311223123283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2827533 + ... + 2935538.

It is an arithmetic number, because the mean of its divisors is an integer number (26556235776).

Almost surely, 2^311223123213 is an apocalyptic number.

It is an amenable number.

311223123213 is a deficient number, since it is larger than the sum of its proper divisors (113676649203).

311223123213 is a wasteful number, since it uses less digits than its factorization.

311223123213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763504.

The product of its digits is 1296, while the sum is 24.

Adding to 311223123213 its reverse (312321322113), we get a palindrome (623544445326).

The spelling of 311223123213 in words is "three hundred eleven billion, two hundred twenty-three million, one hundred twenty-three thousand, two hundred thirteen".