113421205493 has 4 divisors (see below), whose sum is σ = 113427220140. Its totient is φ = 113415190848.

The previous prime is 113421205487. The next prime is 113421205543. The reversal of 113421205493 is 394502124311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 394502124311 = 1187 ⋅332352253.

It can be written as a sum of positive squares in 2 ways, for example, as 106489310929 + 6931894564 = 326327^2 + 83258^2 .

It is a cyclic number.

It is not a de Polignac number, because 113421205493 - 2⁴ = 113421205477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113421205483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2978948 + ... + 3016781.

It is an arithmetic number, because the mean of its divisors is an integer number (28356805035).

Almost surely, 2^113421205493 is an apocalyptic number.

It is an amenable number.

113421205493 is a deficient number, since it is larger than the sum of its proper divisors (6014647).

113421205493 is an equidigital number, since it uses as much as digits as its factorization.

113421205493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6014646.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 113421205493 in words is "one hundred thirteen billion, four hundred twenty-one million, two hundred five thousand, four hundred ninety-three".