113220020 has 12 divisors (see below), whose sum is σ = 237762084. Its totient is φ = 45288000.

The previous prime is 113220013. The next prime is 113220043. The reversal of 113220020 is 20022311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 85636516 + 27583504 = 9254^2 + 5252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 113219983 and 113220010.

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 3 ways as a sum of consecutive naturals, for example, 2830481 + ... + 2830520.

It is an arithmetic number, because the mean of its divisors is an integer number (19813507).

Almost surely, 2^113220020 is an apocalyptic number.

113220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113220020 is an abundant number, since it is smaller than the sum of its proper divisors (124542064).

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

113220020 is a wasteful number, since it uses less digits than its factorization.

113220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5661010 (or 5661008 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 113220020 is about 10640.4896503873. The cubic root of 113220020 is about 483.7723868858.

Adding to 113220020 its reverse (20022311), we get a palindrome (133242331).

The spelling of 113220020 in words is "one hundred thirteen million, two hundred twenty thousand, twenty".