100021032121 has 4 divisors (see below), whose sum is σ = 104369772672. Its totient is φ = 95672291572.

The previous prime is 100021032119. The next prime is 100021032187. The reversal of 100021032121 is 121230120001.

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: 121230120001 = 5623 ⋅21559687.

It is a cyclic number.

It is not a de Polignac number, because 100021032121 - 2¹ = 100021032119 is a prime.

It is a super-2 number, since 2×100021032121² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021032421) 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, 2174370241 + ... + 2174370286.

It is an arithmetic number, because the mean of its divisors is an integer number (26092443168).

Almost surely, 2^100021032121 is an apocalyptic number.

It is an amenable number.

100021032121 is a deficient number, since it is larger than the sum of its proper divisors (4348740551).

100021032121 is an equidigital number, since it uses as much as digits as its factorization.

100021032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4348740550.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 100021032121 its reverse (121230120001), we get a palindrome (221251152122).

The spelling of 100021032121 in words is "one hundred billion, twenty-one million, thirty-two thousand, one hundred twenty-one".