221729338338 has 16 divisors (see below), whose sum is σ = 443621089056. Its totient is φ = 73882710720.

The previous prime is 221729338297. The next prime is 221729338343. The reversal of 221729338338 is 833833927122.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6749431 + ... + 6782202.

It is an arithmetic number, because the mean of its divisors is an integer number (27726318066).

Almost surely, 2^221729338338 is an apocalyptic number.

221729338338 is an abundant number, since it is smaller than the sum of its proper divisors (221891750718).

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

221729338338 is a wasteful number, since it uses less digits than its factorization.

221729338338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13534369.

The product of its digits is 2612736, while the sum is 51.

The spelling of 221729338338 in words is "two hundred twenty-one billion, seven hundred twenty-nine million, three hundred thirty-eight thousand, three hundred thirty-eight".