113213342521 has 4 divisors (see below), whose sum is σ = 113465488500. Its totient is φ = 112961196544.

The previous prime is 113213342519. The next prime is 113213342597. The reversal of 113213342521 is 125243312311.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90604010025 + 22609332496 = 301005^2 + 150364^2 .

It is a cyclic number.

It is not a de Polignac number, because 113213342521 - 2¹ = 113213342519 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 113213342521.

It is not an unprimeable number, because it can be changed into a prime (113213342321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126072316 + ... + 126073213.

It is an arithmetic number, because the mean of its divisors is an integer number (28366372125).

Almost surely, 2^113213342521 is an apocalyptic number.

It is an amenable number.

113213342521 is a deficient number, since it is larger than the sum of its proper divisors (252145979).

113213342521 is an equidigital number, since it uses as much as digits as its factorization.

113213342521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252145978.

The product of its digits is 4320, while the sum is 28.

Adding to 113213342521 its reverse (125243312311), we get a palindrome (238456654832).

The spelling of 113213342521 in words is "one hundred thirteen billion, two hundred thirteen million, three hundred forty-two thousand, five hundred twenty-one".