100102112021 has 4 divisors (see below), whose sum is σ = 100269228000. Its totient is φ = 99934996044.

The previous prime is 100102112017. The next prime is 100102112029. The reversal of 100102112021 is 120211201001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120211201001 = 4051 ⋅29674451.

It is a cyclic number.

It is not a de Polignac number, because 100102112021 - 2² = 100102112017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100102111993 and 100102112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102112029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83557091 + ... + 83558288.

It is an arithmetic number, because the mean of its divisors is an integer number (25067307000).

Almost surely, 2^100102112021 is an apocalyptic number.

It is an amenable number.

100102112021 is a deficient number, since it is larger than the sum of its proper divisors (167115979).

100102112021 is an equidigital number, since it uses as much as digits as its factorization.

100102112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167115978.

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

Adding to 100102112021 its reverse (120211201001), we get a palindrome (220313313022).

The spelling of 100102112021 in words is "one hundred billion, one hundred two million, one hundred twelve thousand, twenty-one".