113203121 has 8 divisors (see below), whose sum is σ = 119878080. Its totient is φ = 106599888.

The previous prime is 113203109. The next prime is 113203157. The reversal of 113203121 is 121302311.

113203121 = T₄₀₆ + T₄₀₇ + ... + T₉₀₆.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113203121 - 2¹⁸ = 112940977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113203096 and 113203105.

It is not an unprimeable number, because it can be changed into a prime (113203021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14666 + ... + 21011.

It is an arithmetic number, because the mean of its divisors is an integer number (14984760).

Almost surely, 2^113203121 is an apocalyptic number.

It is an amenable number.

113203121 is a deficient number, since it is larger than the sum of its proper divisors (6674959).

113203121 is a wasteful number, since it uses less digits than its factorization.

113203121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35863.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 113203121 is about 10639.6955313580. The cubic root of 113203121 is about 483.7483167130.

Adding to 113203121 its reverse (121302311), we get a palindrome (234505432).

It can be divided in two parts, 11320 and 3121, that added together give a palindrome (14441).

The spelling of 113203121 in words is "one hundred thirteen million, two hundred three thousand, one hundred twenty-one".