102100112021 has 4 divisors (see below), whose sum is σ = 102102997344. Its totient is φ = 102097226700.

The previous prime is 102100112017. The next prime is 102100112029. The reversal of 102100112021 is 120211001201.

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 102100112021 - 2² = 102100112017 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 = 102100111993 and 102100112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102100112029) 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, 1388915 + ... + 1460576.

It is an arithmetic number, because the mean of its divisors is an integer number (25525749336).

Almost surely, 2^102100112021 is an apocalyptic number.

It is an amenable number.

102100112021 is a deficient number, since it is larger than the sum of its proper divisors (2885323).

102100112021 is an equidigital number, since it uses as much as digits as its factorization.

102100112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2885322.

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

Adding to 102100112021 its reverse (120211001201), we get a palindrome (222311113222).

The spelling of 102100112021 in words is "one hundred two billion, one hundred million, one hundred twelve thousand, twenty-one".