113011021 has 4 divisors (see below), whose sum is σ = 114130044. Its totient is φ = 111892000.

The previous prime is 113011007. The next prime is 113011033. The reversal of 113011021 is 120110311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 105801796 + 7209225 = 10286^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 113011021 - 2¹³ = 113002829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113010989 and 113011007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113011051) 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, 559360 + ... + 559561.

It is an arithmetic number, because the mean of its divisors is an integer number (28532511).

Almost surely, 2^113011021 is an apocalyptic number.

It is an amenable number.

113011021 is a deficient number, since it is larger than the sum of its proper divisors (1119023).

113011021 is a wasteful number, since it uses less digits than its factorization.

113011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119022.

The product of its (nonzero) digits is 6, while the sum is 10.

The square root of 113011021 is about 10630.6641843302. The cubic root of 113011021 is about 483.4745296031.

Adding to 113011021 its reverse (120110311), we get a palindrome (233121332).

The spelling of 113011021 in words is "one hundred thirteen million, eleven thousand, twenty-one".