21120889328415 has 12 divisors (see below), whose sum is σ = 36609541502664. Its totient is φ = 11264474308464.

The previous prime is 21120889328393. The next prime is 21120889328417. The reversal of 21120889328415 is 51482398802112.

It is a happy number.

21120889328415 is a `hidden beast` number, since 2 + 1 + 120 + 8 + 89 + 3 + 28 + 415 = 666.

21120889328415 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 21120889328415 - 2¹⁸ = 21120889066271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120889328417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 234676548049 + ... + 234676548138.

It is an arithmetic number, because the mean of its divisors is an integer number (3050795125222).

Almost surely, 2^{21120889328415} is an apocalyptic number.

21120889328415 is a deficient number, since it is larger than the sum of its proper divisors (15488652174249).

21120889328415 is a wasteful number, since it uses less digits than its factorization.

21120889328415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469353096198 (or 469353096195 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 54.

The spelling of 21120889328415 in words is "twenty-one trillion, one hundred twenty billion, eight hundred eighty-nine million, three hundred twenty-eight thousand, four hundred fifteen".