113131421 has 8 divisors (see below), whose sum is σ = 122973984. Its totient is φ = 103451760.

The previous prime is 113131399. The next prime is 113131429. The reversal of 113131421 is 124131311.

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 113131421 - 2¹⁰ = 113130397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113131421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113131429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39275 + ... + 42056.

It is an arithmetic number, because the mean of its divisors is an integer number (15371748).

Almost surely, 2^113131421 is an apocalyptic number.

It is an amenable number.

113131421 is a deficient number, since it is larger than the sum of its proper divisors (9842563).

113131421 is a wasteful number, since it uses less digits than its factorization.

113131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81451.

The product of its digits is 72, while the sum is 17.

The square root of 113131421 is about 10636.3255403358. The cubic root of 113131421 is about 483.6461638177.

Adding to 113131421 its reverse (124131311), we get a palindrome (237262732).

The spelling of 113131421 in words is "one hundred thirteen million, one hundred thirty-one thousand, four hundred twenty-one".