2222221000121 has 32 divisors (see below), whose sum is σ = 2413362201600. Its totient is φ = 2041109280000.

The previous prime is 2222221000117. The next prime is 2222221000123. The reversal of 2222221000121 is 1210001222222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2222221000121 - 2² = 2222221000117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2222221000121.

It is not an unprimeable number, because it can be changed into a prime (2222221000123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98095646 + ... + 98118296.

It is an arithmetic number, because the mean of its divisors is an integer number (75417568800).

Almost surely, 2^{2222221000121} is an apocalyptic number.

It is an amenable number.

2222221000121 is a deficient number, since it is larger than the sum of its proper divisors (191141201479).

2222221000121 is a wasteful number, since it uses less digits than its factorization.

2222221000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24561.

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

Adding to 2222221000121 its reverse (1210001222222), we get a palindrome (3432222222343).

The spelling of 2222221000121 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty-one", and thus it is an aban number.