212222103221 has 4 divisors (see below), whose sum is σ = 212256081312. Its totient is φ = 212188125132.

The previous prime is 212222103199. The next prime is 212222103263. The reversal of 212222103221 is 122301222212.

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 212222103221 - 2²⁶ = 212154994357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212222103193 and 212222103202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222103271) 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, 16979675 + ... + 16992168.

It is an arithmetic number, because the mean of its divisors is an integer number (53064020328).

Almost surely, 2^212222103221 is an apocalyptic number.

It is an amenable number.

212222103221 is a deficient number, since it is larger than the sum of its proper divisors (33978091).

212222103221 is an equidigital number, since it uses as much as digits as its factorization.

212222103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33978090.

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

Adding to 212222103221 its reverse (122301222212), we get a palindrome (334523325433).

The spelling of 212222103221 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred three thousand, two hundred twenty-one".