221585942216292 has 24 divisors (see below), whose sum is σ = 517036163011200. Its totient is φ = 73861652475936.

The previous prime is 221585942216267. The next prime is 221585942216341. The reversal of 221585942216292 is 292612249585122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38212492 + ... + 43627587.

It is an arithmetic number, because the mean of its divisors is an integer number (21543173458800).

Almost surely, 2^{221585942216292} is an apocalyptic number.

It is an amenable number.

221585942216292 is an abundant number, since it is smaller than the sum of its proper divisors (295450220794908).

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

221585942216292 is a wasteful number, since it uses less digits than its factorization.

221585942216292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82065715 (or 82065713 counting only the distinct ones).

The product of its digits is 24883200, while the sum is 60.

The spelling of 221585942216292 in words is "two hundred twenty-one trillion, five hundred eighty-five billion, nine hundred forty-two million, two hundred sixteen thousand, two hundred ninety-two".