113204534521 has 4 divisors (see below), whose sum is σ = 121912575652. Its totient is φ = 104496493392.

The previous prime is 113204534459. The next prime is 113204534563. The reversal of 113204534521 is 125435402311.

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 7189174521 + 106015360000 = 84789^2 + 325600^2 .

It is a cyclic number.

It is not a de Polignac number, because 113204534521 - 2¹¹ = 113204532473 is a prime.

It is a super-2 number, since 2×113204534521² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113204534591) 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 3 ways as a sum of consecutive naturals, for example, 4354020546 + ... + 4354020571.

It is an arithmetic number, because the mean of its divisors is an integer number (30478143913).

Almost surely, 2^113204534521 is an apocalyptic number.

It is an amenable number.

113204534521 is a deficient number, since it is larger than the sum of its proper divisors (8708041131).

113204534521 is an equidigital number, since it uses as much as digits as its factorization.

113204534521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8708041130.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 113204534521 its reverse (125435402311), we get a palindrome (238639936832).

The spelling of 113204534521 in words is "one hundred thirteen billion, two hundred four million, five hundred thirty-four thousand, five hundred twenty-one".