115551051021 has 12 divisors (see below), whose sum is σ = 190750941472. Its totient is φ = 66029171976.

The previous prime is 115551051001. The next prime is 115551051151. The reversal of 115551051021 is 120150155511.

It is a happy number.

115551051021 is a `hidden beast` number, since 1 + 1 + 5 + 551 + 0 + 5 + 102 + 1 = 666.

It is not a de Polignac number, because 115551051021 - 2¹⁸ = 115550788877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115551051001) 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, 917071771 + ... + 917071896.

Almost surely, 2^115551051021 is an apocalyptic number.

It is an amenable number.

115551051021 is a deficient number, since it is larger than the sum of its proper divisors (75199890451).

115551051021 is a wasteful number, since it uses less digits than its factorization.

115551051021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1834143680 (or 1834143677 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 27.

The spelling of 115551051021 in words is "one hundred fifteen billion, five hundred fifty-one million, fifty-one thousand, twenty-one".