222102012021 has 4 divisors (see below), whose sum is σ = 296136016032. Its totient is φ = 148068008012.

The previous prime is 222102012017. The next prime is 222102012091. The reversal of 222102012021 is 120210201222.

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 222102012021 - 2² = 222102012017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222102012091) 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, 37017002001 + ... + 37017002006.

It is an arithmetic number, because the mean of its divisors is an integer number (74034004008).

Almost surely, 2^222102012021 is an apocalyptic number.

It is an amenable number.

222102012021 is a deficient number, since it is larger than the sum of its proper divisors (74034004011).

222102012021 is an equidigital number, since it uses as much as digits as its factorization.

222102012021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74034004010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222102012021 its reverse (120210201222), we get a palindrome (342312213243).

The spelling of 222102012021 in words is "two hundred twenty-two billion, one hundred two million, twelve thousand, twenty-one".