212331131213 has 4 divisors (see below), whose sum is σ = 212932636188. Its totient is φ = 211729626240.

The previous prime is 212331131203. The next prime is 212331131219. The reversal of 212331131213 is 312131133212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70550265769 + 141780865444 = 265613^2 + 376538^2 .

It is a cyclic number.

It is not a de Polignac number, because 212331131213 - 2¹⁶ = 212331065677 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 (212331131219) 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, 300751958 + ... + 300752663.

It is an arithmetic number, because the mean of its divisors is an integer number (53233159047).

Almost surely, 2^212331131213 is an apocalyptic number.

It is an amenable number.

212331131213 is a deficient number, since it is larger than the sum of its proper divisors (601504975).

212331131213 is an equidigital number, since it uses as much as digits as its factorization.

212331131213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601504974.

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

Adding to 212331131213 its reverse (312131133212), we get a palindrome (524462264425).

The spelling of 212331131213 in words is "two hundred twelve billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred thirteen".