312212212213 has 4 divisors (see below), whose sum is σ = 340595140608. Its totient is φ = 283829283820.

The previous prime is 312212212183. The next prime is 312212212217.

312212212213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312212212213 - 2¹³ = 312212204021 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 (312212212217) 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, 14191464181 + ... + 14191464202.

It is an arithmetic number, because the mean of its divisors is an integer number (85148785152).

Almost surely, 2^312212212213 is an apocalyptic number.

It is an amenable number.

312212212213 is a deficient number, since it is larger than the sum of its proper divisors (28382928395).

312212212213 is a wasteful number, since it uses less digits than its factorization.

312212212213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28382928394.

The product of its digits is 576, while the sum is 22.

Multiplying 312212212213 by its sum of digits (22), we get a palindrome (6868668668686).

It can be divided in two parts, 312212 and 212213, that added together give a palindrome (524425).

The spelling of 312212212213 in words is "three hundred twelve billion, two hundred twelve million, two hundred twelve thousand, two hundred thirteen".