100120112021 has 4 divisors (see below), whose sum is σ = 100241765472. Its totient is φ = 99998458572.

The previous prime is 100120111979. The next prime is 100120112087. The reversal of 100120112021 is 120211021001.

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 100120112021 - 2¹⁴ = 100120095637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100120111993 and 100120112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100120612021) 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, 60825491 + ... + 60827136.

It is an arithmetic number, because the mean of its divisors is an integer number (25060441368).

Almost surely, 2^100120112021 is an apocalyptic number.

It is an amenable number.

100120112021 is a deficient number, since it is larger than the sum of its proper divisors (121653451).

100120112021 is an equidigital number, since it uses as much as digits as its factorization.

100120112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121653450.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100120112021 its reverse (120211021001), we get a palindrome (220331133022).

The spelling of 100120112021 in words is "one hundred billion, one hundred twenty million, one hundred twelve thousand, twenty-one".