222110000022221 has 4 divisors (see below), whose sum is σ = 222290430567744. Its totient is φ = 221929569476700.

The previous prime is 222110000022179. The next prime is 222110000022277. The reversal of 222110000022221 is 122220000011222.

It is a happy number.

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 222110000022221 - 2¹⁰ = 222110000021197 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 222110000022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222110000052221) 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, 90215270915 + ... + 90215273376.

It is an arithmetic number, because the mean of its divisors is an integer number (55572607641936).

Almost surely, 2^{222110000022221} is an apocalyptic number.

It is an amenable number.

222110000022221 is a deficient number, since it is larger than the sum of its proper divisors (180430545523).

222110000022221 is a wasteful number, since it uses less digits than its factorization.

222110000022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180430545522.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222110000022221 its reverse (122220000011222), we get a palindrome (344330000033443).

The spelling of 222110000022221 in words is "two hundred twenty-two trillion, one hundred ten billion, twenty-two thousand, two hundred twenty-one".