215412500237221 has 12 divisors (see below), whose sum is σ = 250582349740800. Its totient is φ = 184638945710520.

The previous prime is 215412500237071. The next prime is 215412500237293. The reversal of 215412500237221 is 122732005214512.

215412500237221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215412500237221 - 2¹⁹ = 215412499712933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215412500235221) 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, 24905980 + ... + 32421178.

It is an arithmetic number, because the mean of its divisors is an integer number (20881862478400).

Almost surely, 2^{215412500237221} is an apocalyptic number.

It is an amenable number.

215412500237221 is a deficient number, since it is larger than the sum of its proper divisors (35169849503579).

215412500237221 is an equidigital number, since it uses as much as digits as its factorization.

215412500237221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8100184 (or 8100177 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 37.

The spelling of 215412500237221 in words is "two hundred fifteen trillion, four hundred twelve billion, five hundred million, two hundred thirty-seven thousand, two hundred twenty-one".