221967698085 has 64 divisors (see below), whose sum is σ = 455360655360. Its totient is φ = 100485748800.

The previous prime is 221967698077. The next prime is 221967698093. The reversal of 221967698085 is 580896769122.

221967698085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (221967698077) and next prime (221967698093).

It is not a de Polignac number, because 221967698085 - 2³ = 221967698077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1042891 + ... + 1237560.

It is an arithmetic number, because the mean of its divisors is an integer number (7115010240).

Almost surely, 2^221967698085 is an apocalyptic number.

It is an amenable number.

221967698085 is an abundant number, since it is smaller than the sum of its proper divisors (233392957275).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221967698085 is a wasteful number, since it uses less digits than its factorization.

221967698085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280575 (or 2280569 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 63.

The spelling of 221967698085 in words is "two hundred twenty-one billion, nine hundred sixty-seven million, six hundred ninety-eight thousand, eighty-five".