113257040021 has 4 divisors (see below), whose sum is σ = 113560678572. Its totient is φ = 112953401472.

The previous prime is 113257040009. The next prime is 113257040077. The reversal of 113257040021 is 120040752311.

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 20543488900 + 92713551121 = 143330^2 + 304489^2 .

It is a cyclic number.

It is not a de Polignac number, because 113257040021 - 2¹⁰ = 113257038997 is a prime.

It is a super-2 number, since 2×113257040021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113257040521) 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, 151818716 + ... + 151819461.

It is an arithmetic number, because the mean of its divisors is an integer number (28390169643).

Almost surely, 2^113257040021 is an apocalyptic number.

It is an amenable number.

113257040021 is a deficient number, since it is larger than the sum of its proper divisors (303638551).

113257040021 is an equidigital number, since it uses as much as digits as its factorization.

113257040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303638550.

The product of its (nonzero) digits is 1680, while the sum is 26.

Adding to 113257040021 its reverse (120040752311), we get a palindrome (233297792332).

The spelling of 113257040021 in words is "one hundred thirteen billion, two hundred fifty-seven million, forty thousand, twenty-one".