222102102220021 has 4 divisors (see below), whose sum is σ = 222105435001312. Its totient is φ = 222098769438732.

The previous prime is 222102102219901. The next prime is 222102102220027. The reversal of 222102102220021 is 120022201201222.

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 222102102220021 - 2¹⁵ = 222102102187253 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 (222102102220027) 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, 1666290681 + ... + 1666423966.

It is an arithmetic number, because the mean of its divisors is an integer number (55526358750328).

Almost surely, 2^{222102102220021} is an apocalyptic number.

It is an amenable number.

222102102220021 is a deficient number, since it is larger than the sum of its proper divisors (3332781291).

222102102220021 is an equidigital number, since it uses as much as digits as its factorization.

222102102220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332781290.

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

Adding to 222102102220021 its reverse (120022201201222), we get a palindrome (342124303421243).

The spelling of 222102102220021 in words is "two hundred twenty-two trillion, one hundred two billion, one hundred two million, two hundred twenty thousand, twenty-one".