113401221 has 8 divisors (see below), whose sum is σ = 152392704. Its totient is φ = 75005280.

The previous prime is 113401217. The next prime is 113401229. The reversal of 113401221 is 122104311.

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

It is not a de Polignac number, because 113401221 - 2² = 113401217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113401221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113401229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148440 + ... + 149201.

It is an arithmetic number, because the mean of its divisors is an integer number (19049088).

Almost surely, 2^113401221 is an apocalyptic number.

It is an amenable number.

113401221 is a deficient number, since it is larger than the sum of its proper divisors (38991483).

113401221 is a wasteful number, since it uses less digits than its factorization.

113401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297771.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 113401221 is about 10649.0009390553. Note that the first 3 decimals coincide. The cubic root of 113401221 is about 484.0303310113.

Adding to 113401221 its reverse (122104311), we get a palindrome (235505532).

It can be divided in two parts, 11340 and 1221, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 113401221 in words is "one hundred thirteen million, four hundred one thousand, two hundred twenty-one".