212221222013 has 4 divisors (see below), whose sum is σ = 212971120608. Its totient is φ = 211471323420.

The previous prime is 212221222009. The next prime is 212221222027. The reversal of 212221222013 is 310222122212.

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 212221222013 - 2² = 212221222009 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 (212221222043) 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, 374948873 + ... + 374949438.

It is an arithmetic number, because the mean of its divisors is an integer number (53242780152).

Almost surely, 2^212221222013 is an apocalyptic number.

It is an amenable number.

212221222013 is a deficient number, since it is larger than the sum of its proper divisors (749898595).

212221222013 is an equidigital number, since it uses as much as digits as its factorization.

212221222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749898594.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212221222013 its reverse (310222122212), we get a palindrome (522443344225).

The spelling of 212221222013 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, thirteen".