2113113021 has 8 divisors (see below), whose sum is σ = 2870644320. Its totient is φ = 1382161872.

The previous prime is 2113113001. The next prime is 2113113049. The reversal of 2113113021 is 1203113112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2113113021 - 2⁹ = 2113112509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113113001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6644851 + ... + 6645168.

It is an arithmetic number, because the mean of its divisors is an integer number (358830540).

Almost surely, 2^2113113021 is an apocalyptic number.

It is an amenable number.

2113113021 is a deficient number, since it is larger than the sum of its proper divisors (757531299).

2113113021 is a wasteful number, since it uses less digits than its factorization.

2113113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290075.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 2113113021 is about 45968.6090827208. The cubic root of 2113113021 is about 1283.2390745560.

Adding to 2113113021 its reverse (1203113112), we get a palindrome (3316226133).

Subtracting from 2113113021 its reverse (1203113112), we obtain a palindrome (909999909).

The spelling of 2113113021 in words is "two billion, one hundred thirteen million, one hundred thirteen thousand, twenty-one".