222100002121 has 8 divisors (see below), whose sum is σ = 222884395200. Its totient is φ = 221316439248.

The previous prime is 222100002077. The next prime is 222100002139. The reversal of 222100002121 is 121200001222.

It is a happy number.

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-222100002121 is a prime.

It is a super-3 number, since 3×222100002121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222100002721) 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, 330900 + ... + 744106.

It is an arithmetic number, because the mean of its divisors is an integer number (27860549400).

Almost surely, 2^222100002121 is an apocalyptic number.

It is an amenable number.

222100002121 is a deficient number, since it is larger than the sum of its proper divisors (784393079).

222100002121 is a wasteful number, since it uses less digits than its factorization.

222100002121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415103.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 222100002121 its reverse (121200001222), we get a palindrome (343300003343).

The spelling of 222100002121 in words is "two hundred twenty-two billion, one hundred million, two thousand, one hundred twenty-one".