221984934911 has 4 divisors (see below), whose sum is σ = 222429795000. Its totient is φ = 221540074824.

The previous prime is 221984934893. The next prime is 221984934917. The reversal of 221984934911 is 119439489122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221984934911 - 2³⁴ = 204805065727 is a prime.

It is a super-2 number, since 2×221984934911² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221984934917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222429296 + ... + 222430293.

It is an arithmetic number, because the mean of its divisors is an integer number (55607448750).

Almost surely, 2^221984934911 is an apocalyptic number.

221984934911 is a deficient number, since it is larger than the sum of its proper divisors (444860089).

221984934911 is an equidigital number, since it uses as much as digits as its factorization.

221984934911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444860088.

The product of its digits is 1119744, while the sum is 53.

The spelling of 221984934911 in words is "two hundred twenty-one billion, nine hundred eighty-four million, nine hundred thirty-four thousand, nine hundred eleven".