212312220232213 has 4 divisors (see below), whose sum is σ = 212312281918828. Its totient is φ = 212312158545600.

The previous prime is 212312220232199. The next prime is 212312220232261. The reversal of 212312220232213 is 312232022213212.

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 13963248248049 + 198348971984164 = 3736743^2 + 14083642^2 .

It is a cyclic number.

It is not a de Polignac number, because 212312220232213 - 2³⁷ = 212174781278741 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 (212312220232613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25355106 + ... + 32672707.

It is an arithmetic number, because the mean of its divisors is an integer number (53078070479707).

Almost surely, 2^{212312220232213} is an apocalyptic number.

It is an amenable number.

212312220232213 is a deficient number, since it is larger than the sum of its proper divisors (61686615).

212312220232213 is an equidigital number, since it uses as much as digits as its factorization.

212312220232213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61686614.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 212312220232213 its reverse (312232022213212), we get a palindrome (524544242445425).

The spelling of 212312220232213 in words is "two hundred twelve trillion, three hundred twelve billion, two hundred twenty million, two hundred thirty-two thousand, two hundred thirteen".