222212212021 has 4 divisors (see below), whose sum is σ = 223191120672. Its totient is φ = 221233303372.

The previous prime is 222212212007. The next prime is 222212212037. The reversal of 222212212021 is 120212212222.

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 a de Polignac number, because none of the positive numbers 2^k-222212212021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222212212021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222212215021) 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, 489453985 + ... + 489454438.

It is an arithmetic number, because the mean of its divisors is an integer number (55797780168).

Almost surely, 2^222212212021 is an apocalyptic number.

It is an amenable number.

222212212021 is a deficient number, since it is larger than the sum of its proper divisors (978908651).

222212212021 is an equidigital number, since it uses as much as digits as its factorization.

222212212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978908650.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 222212212021 its reverse (120212212222), we get a palindrome (342424424243).

The spelling of 222212212021 in words is "two hundred twenty-two billion, two hundred twelve million, two hundred twelve thousand, twenty-one".