921101113 has 4 divisors (see below), whose sum is σ = 930221028. Its totient is φ = 911981200.

The previous prime is 921101099. The next prime is 921101117. The reversal of 921101113 is 311101129.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311101129 = 367 ⋅847687.

It can be written as a sum of positive squares in 2 ways, for example, as 542098089 + 379003024 = 23283^2 + 19468^2 .

It is a cyclic number.

It is not a de Polignac number, because 921101113 - 2²⁹ = 384230201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (921101117) 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, 4559806 + ... + 4560007.

It is an arithmetic number, because the mean of its divisors is an integer number (232555257).

Almost surely, 2^921101113 is an apocalyptic number.

It is an amenable number.

921101113 is a deficient number, since it is larger than the sum of its proper divisors (9119915).

921101113 is a wasteful number, since it uses less digits than its factorization.

921101113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9119914.

The product of its (nonzero) digits is 54, while the sum is 19.

The square root of 921101113 is about 30349.6476585808. The cubic root of 921101113 is about 972.9766897088.

The spelling of 921101113 in words is "nine hundred twenty-one million, one hundred one thousand, one hundred thirteen".