100222000121 has 8 divisors (see below), whose sum is σ = 101357132040. Its totient is φ = 99087069312.

The previous prime is 100222000117. The next prime is 100222000139. The reversal of 100222000121 is 121000222001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11336925625 + 88885074496 = 106475^2 + 298136^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100222000121 - 2² = 100222000117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100222000721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1100111 + ... + 1187723.

It is an arithmetic number, because the mean of its divisors is an integer number (12669641505).

Almost surely, 2^100222000121 is an apocalyptic number.

It is an amenable number.

100222000121 is a deficient number, since it is larger than the sum of its proper divisors (1135131919).

100222000121 is an equidigital number, since it uses as much as digits as its factorization.

100222000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100555.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 100222000121 its reverse (121000222001), we get a palindrome (221222222122).

The spelling of 100222000121 in words is "one hundred billion, two hundred twenty-two million, one hundred twenty-one", and thus it is an aban number.