115520021120021 has 12 divisors (see below), whose sum is σ = 135685097132832. Its totient is φ = 98055829295928.

The previous prime is 115520021120011. The next prime is 115520021120129. The reversal of 115520021120021 is 120021120025511.

It is not a de Polignac number, because 115520021120021 - 2²² = 115520016925717 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 (115520021120011) 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 11 ways as a sum of consecutive naturals, for example, 11444419475 + ... + 11444429568.

It is an arithmetic number, because the mean of its divisors is an integer number (11307091427736).

Almost surely, 2^{115520021120021} is an apocalyptic number.

It is an amenable number.

115520021120021 is a deficient number, since it is larger than the sum of its proper divisors (20165076012811).

115520021120021 is a wasteful number, since it uses less digits than its factorization.

115520021120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22888849160 (or 22888849153 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 23.

Adding to 115520021120021 its reverse (120021120025511), we get a palindrome (235541141145532).

The spelling of 115520021120021 in words is "one hundred fifteen trillion, five hundred twenty billion, twenty-one million, one hundred twenty thousand, twenty-one".