113203120 has 20 divisors (see below), whose sum is σ = 263197440. Its totient is φ = 45281216.

The previous prime is 113203109. The next prime is 113203157. The reversal of 113203120 is 21302311.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 113203120.

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, 707440 + ... + 707599.

It is an arithmetic number, because the mean of its divisors is an integer number (13159872).

Almost surely, 2^113203120 is an apocalyptic number.

113203120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113203120 is an abundant number, since it is smaller than the sum of its proper divisors (149994320).

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

113203120 is a wasteful number, since it uses less digits than its factorization.

113203120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415052 (or 1415046 counting only the distinct ones).

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

The square root of 113203120 is about 10639.6954843642. The cubic root of 113203120 is about 483.7483152886.

Adding to 113203120 its reverse (21302311), we get a palindrome (134505431).

The spelling of 113203120 in words is "one hundred thirteen million, two hundred three thousand, one hundred twenty".