7921100101 has 4 divisors (see below), whose sum is σ = 7923336832. Its totient is φ = 7918863372.

The previous prime is 7921100063. The next prime is 7921100183. The reversal of 7921100101 is 1010011297.

7921100101 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 7921100101 - 2¹⁷ = 7920969029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7921101101) 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, 1113045 + ... + 1120138.

It is an arithmetic number, because the mean of its divisors is an integer number (1980834208).

Almost surely, 2^7921100101 is an apocalyptic number.

It is an amenable number.

7921100101 is a deficient number, since it is larger than the sum of its proper divisors (2236731).

7921100101 is a wasteful number, since it uses less digits than its factorization.

7921100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236730.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 7921100101 is about 89000.5623633918. The cubic root of 7921100101 is about 1993.4032739417.

Adding to 7921100101 its reverse (1010011297), we get a palindrome (8931111398).

The spelling of 7921100101 in words is "seven billion, nine hundred twenty-one million, one hundred thousand, one hundred one".