115312443021 has 16 divisors (see below), whose sum is σ = 171080502720. Its totient is φ = 76763697840.

The previous prime is 115312442953. The next prime is 115312443023. The reversal of 115312443021 is 120344213511.

115312443021 is a `hidden beast` number, since 1 + 1 + 5 + 312 + 44 + 302 + 1 = 666.

It is not a de Polignac number, because 115312443021 - 2⁷ = 115312442893 is a prime.

It is a super-3 number, since 3×115312443021³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115312443023) 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 15 ways as a sum of consecutive naturals, for example, 3071670 + ... + 3108983.

It is an arithmetic number, because the mean of its divisors is an integer number (10692531420).

Almost surely, 2^115312443021 is an apocalyptic number.

It is an amenable number.

115312443021 is a deficient number, since it is larger than the sum of its proper divisors (55768059699).

115312443021 is an equidigital number, since it uses as much as digits as its factorization.

115312443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181353 (or 6181347 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 115312443021 its reverse (120344213511), we get a palindrome (235656656532).

The spelling of 115312443021 in words is "one hundred fifteen billion, three hundred twelve million, four hundred forty-three thousand, twenty-one".