113121020 has 24 divisors (see below), whose sum is σ = 237780144. Its totient is φ = 45205376.

The previous prime is 113120981. The next prime is 113121031. The reversal of 113121020 is 20121311.

It is a junction number, because it is equal to n+sod(n) for n = 113120992 and 113121010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26687 + ... + 30633.

It is an arithmetic number, because the mean of its divisors is an integer number (9907506).

Almost surely, 2^113121020 is an apocalyptic number.

113121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113121020 is an abundant number, since it is smaller than the sum of its proper divisors (124659124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

113121020 is a wasteful number, since it uses less digits than its factorization.

113121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389 (or 5387 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 113121020 is about 10635.8365914487. The cubic root of 113121020 is about 483.6313416523.

Adding to 113121020 its reverse (20121311), we get a palindrome (133242331).

The spelling of 113121020 in words is "one hundred thirteen million, one hundred twenty-one thousand, twenty".