220222002121 has 4 divisors (see below), whose sum is σ = 240242184144. Its totient is φ = 200201820100.

The previous prime is 220222002109. The next prime is 220222002137. The reversal of 220222002121 is 121200222022.

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 220222002121 - 2¹⁷ = 220221871049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220222002095 and 220222002104.

It is not an unprimeable number, because it can be changed into a prime (220222002521) 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, 10010090995 + ... + 10010091016.

It is an arithmetic number, because the mean of its divisors is an integer number (60060546036).

Almost surely, 2^220222002121 is an apocalyptic number.

It is an amenable number.

220222002121 is a deficient number, since it is larger than the sum of its proper divisors (20020182023).

220222002121 is a wasteful number, since it uses less digits than its factorization.

220222002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020182022.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 220222002121 its reverse (121200222022), we get a palindrome (341422224143).

The spelling of 220222002121 in words is "two hundred twenty billion, two hundred twenty-two million, two thousand, one hundred twenty-one".