212331122013 has 4 divisors (see below), whose sum is σ = 283108162688. Its totient is φ = 141554081340.

The previous prime is 212331121991. The next prime is 212331122033. The reversal of 212331122013 is 310221133212.

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 not a de Polignac number, because 212331122013 - 2¹² = 212331117917 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 (212331122033) 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, 35388520333 + ... + 35388520338.

It is an arithmetic number, because the mean of its divisors is an integer number (70777040672).

Almost surely, 2^212331122013 is an apocalyptic number.

It is an amenable number.

212331122013 is a deficient number, since it is larger than the sum of its proper divisors (70777040675).

212331122013 is an equidigital number, since it uses as much as digits as its factorization.

212331122013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70777040674.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 212331122013 its reverse (310221133212), we get a palindrome (522552255225).

The spelling of 212331122013 in words is "two hundred twelve billion, three hundred thirty-one million, one hundred twenty-two thousand, thirteen".