212413302221 has 4 divisors (see below), whose sum is σ = 215405038944. Its totient is φ = 209421565500.

The previous prime is 212413302197. The next prime is 212413302251. The reversal of 212413302221 is 122203314212.

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 212413302221 - 2³⁴ = 195233433037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212413302251) 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, 1495868255 + ... + 1495868396.

It is an arithmetic number, because the mean of its divisors is an integer number (53851259736).

Almost surely, 2^212413302221 is an apocalyptic number.

It is an amenable number.

212413302221 is a deficient number, since it is larger than the sum of its proper divisors (2991736723).

212413302221 is an equidigital number, since it uses as much as digits as its factorization.

212413302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2991736722.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212413302221 its reverse (122203314212), we get a palindrome (334616616433).

The spelling of 212413302221 in words is "two hundred twelve billion, four hundred thirteen million, three hundred two thousand, two hundred twenty-one".