221759396221242 has 32 divisors (see below), whose sum is σ = 483855639182784. Its totient is φ = 67197461964800.

The previous prime is 221759396221217. The next prime is 221759396221247. The reversal of 221759396221242 is 242122693957122.

It is a super-2 number, since 2×221759396221242² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221759396221247) 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 15 ways as a sum of consecutive naturals, for example, 56978823 + ... + 60746234.

It is an arithmetic number, because the mean of its divisors is an integer number (15120488724462).

Almost surely, 2^{221759396221242} is an apocalyptic number.

221759396221242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221759396221242 is an abundant number, since it is smaller than the sum of its proper divisors (262096242961542).

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

221759396221242 is a wasteful number, since it uses less digits than its factorization.

221759396221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117753614.

The product of its digits is 13063680, while the sum is 57.

The spelling of 221759396221242 in words is "two hundred twenty-one trillion, seven hundred fifty-nine billion, three hundred ninety-six million, two hundred twenty-one thousand, two hundred forty-two".