221198865311 has 8 divisors (see below), whose sum is σ = 221758422144. Its totient is φ = 220639979160.

The previous prime is 221198865271. The next prime is 221198865319. The reversal of 221198865311 is 113568891122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221198865311 - 2¹⁸ = 221198603167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221198865319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 496100 + ... + 829766.

It is an arithmetic number, because the mean of its divisors is an integer number (27719802768).

Almost surely, 2^221198865311 is an apocalyptic number.

221198865311 is a deficient number, since it is larger than the sum of its proper divisors (559556833).

221198865311 is a wasteful number, since it uses less digits than its factorization.

221198865311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335341.

The product of its digits is 207360, while the sum is 47.

The spelling of 221198865311 in words is "two hundred twenty-one billion, one hundred ninety-eight million, eight hundred sixty-five thousand, three hundred eleven".