221222101121 has 8 divisors (see below), whose sum is σ = 252956203584. Its totient is φ = 189520734960.

The previous prime is 221222101031. The next prime is 221222101151. The reversal of 221222101121 is 121101222122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221222101121 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221222101121.

It is not an unprimeable number, because it can be changed into a prime (221222101151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8169590 + ... + 8196623.

It is an arithmetic number, because the mean of its divisors is an integer number (31619525448).

Almost surely, 2^221222101121 is an apocalyptic number.

It is an amenable number.

221222101121 is a deficient number, since it is larger than the sum of its proper divisors (31734102463).

221222101121 is a wasteful number, since it uses less digits than its factorization.

221222101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16368151.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221222101121 its reverse (121101222122), we get a palindrome (342323323243).

The spelling of 221222101121 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, one hundred twenty-one".