113320021 has 4 divisors (see below), whose sum is σ = 113998752. Its totient is φ = 112641292.

The previous prime is 113320019. The next prime is 113320037. The reversal of 113320021 is 120023311.

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: 120023311 = 421 ⋅285091.

It is a cyclic number.

It is not a de Polignac number, because 113320021 - 2¹ = 113320019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113319983 and 113320010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113320001) 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, 339115 + ... + 339448.

It is an arithmetic number, because the mean of its divisors is an integer number (28499688).

Almost surely, 2^113320021 is an apocalyptic number.

It is an amenable number.

113320021 is a deficient number, since it is larger than the sum of its proper divisors (678731).

113320021 is an equidigital number, since it uses as much as digits as its factorization.

113320021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678730.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 113320021 is about 10645.1876920982. The cubic root of 113320021 is about 483.9147747966.

Adding to 113320021 its reverse (120023311), we get a palindrome (233343332).

The spelling of 113320021 in words is "one hundred thirteen million, three hundred twenty thousand, twenty-one".