113113021 has 12 divisors (see below), whose sum is σ = 136119420. Its totient is φ = 93609600.

The previous prime is 113113003. The next prime is 113113027. The reversal of 113113021 is 120311311.

It can be written as a sum of positive squares in 2 ways, for example, as 17757796 + 95355225 = 4214^2 + 9765^2 .

It is not a de Polignac number, because 113113021 - 2¹¹ = 113110973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113112992 and 113113010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113113027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38380 + ... + 41221.

It is an arithmetic number, because the mean of its divisors is an integer number (11343285).

Almost surely, 2^113113021 is an apocalyptic number.

It is an amenable number.

113113021 is a deficient number, since it is larger than the sum of its proper divisors (23006399).

113113021 is an equidigital number, since it uses as much as digits as its factorization.

113113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79644 (or 79637 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 113113021 is about 10635.4605448001. The cubic root of 113113021 is about 483.6199418897.

Adding to 113113021 its reverse (120311311), we get a palindrome (233424332).

The spelling of 113113021 in words is "one hundred thirteen million, one hundred thirteen thousand, twenty-one".