100112212221121 has 4 divisors (see below), whose sum is σ = 100112240077744. Its totient is φ = 100112184364500.

The previous prime is 100112212221103. The next prime is 100112212221137. The reversal of 100112212221121 is 121122212211001.

It is a happy number.

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 100112212221121 - 2⁵ = 100112212221089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100112212221181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7570035 + ... + 16047736.

It is an arithmetic number, because the mean of its divisors is an integer number (25028060019436).

Almost surely, 2^{100112212221121} is an apocalyptic number.

It is an amenable number.

100112212221121 is a deficient number, since it is larger than the sum of its proper divisors (27856623).

100112212221121 is an equidigital number, since it uses as much as digits as its factorization.

100112212221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27856622.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 100112212221121 its reverse (121122212211001), we get a palindrome (221234424432122).

The spelling of 100112212221121 in words is "one hundred trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty-one".