100120112121 has 4 divisors (see below), whose sum is σ = 133493482832. Its totient is φ = 66746741412.

The previous prime is 100120112101. The next prime is 100120112123. The reversal of 100120112121 is 121211021001.

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 de Polignac number, because none of the positive numbers 2^k-100120112121 is a prime.

It is a super-2 number, since 2×100120112121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100120112097 and 100120112106.

It is not an unprimeable number, because it can be changed into a prime (100120112123) 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, 16686685351 + ... + 16686685356.

It is an arithmetic number, because the mean of its divisors is an integer number (33373370708).

Almost surely, 2^100120112121 is an apocalyptic number.

It is an amenable number.

100120112121 is a deficient number, since it is larger than the sum of its proper divisors (33373370711).

100120112121 is an equidigital number, since it uses as much as digits as its factorization.

100120112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33373370710.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 100120112121 its reverse (121211021001), we get a palindrome (221331133122).

The spelling of 100120112121 in words is "one hundred billion, one hundred twenty million, one hundred twelve thousand, one hundred twenty-one".