115234510021 has 4 divisors (see below), whose sum is σ = 115283736844. Its totient is φ = 115185283200.

The previous prime is 115234510007. The next prime is 115234510031. The reversal of 115234510021 is 120015432511.

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 104013345121 + 11221164900 = 322511^2 + 105930^2 .

It is a cyclic number.

It is not a de Polignac number, because 115234510021 - 2¹³ = 115234501829 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 (115234510031) 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, 24609900 + ... + 24614581.

It is an arithmetic number, because the mean of its divisors is an integer number (28820934211).

Almost surely, 2^115234510021 is an apocalyptic number.

It is an amenable number.

115234510021 is a deficient number, since it is larger than the sum of its proper divisors (49226823).

115234510021 is an equidigital number, since it uses as much as digits as its factorization.

115234510021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49226822.

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 115234510021 its reverse (120015432511), we get a palindrome (235249942532).

The spelling of 115234510021 in words is "one hundred fifteen billion, two hundred thirty-four million, five hundred ten thousand, twenty-one".