100121200122221 has 4 divisors (see below), whose sum is σ = 100121274793344. Its totient is φ = 100121125451100.

The previous prime is 100121200122179. The next prime is 100121200122233. The reversal of 100121200122221 is 122221002121001.

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 100121200122221 - 2³⁴ = 100104020253037 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 100121200122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121200128221) 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 3 ways as a sum of consecutive naturals, for example, 35286845 + ... + 38018466.

It is an arithmetic number, because the mean of its divisors is an integer number (25030318698336).

Almost surely, 2^{100121200122221} is an apocalyptic number.

It is an amenable number.

100121200122221 is a deficient number, since it is larger than the sum of its proper divisors (74671123).

100121200122221 is an equidigital number, since it uses as much as digits as its factorization.

100121200122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74671122.

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

Adding to 100121200122221 its reverse (122221002121001), we get a palindrome (222342202243222).

The spelling of 100121200122221 in words is "one hundred trillion, one hundred twenty-one billion, two hundred million, one hundred twenty-two thousand, two hundred twenty-one".