221419836722 has 18 divisors (see below), whose sum is σ = 386363149533. Its totient is φ = 94892219352.

The previous prime is 221419836611. The next prime is 221419836727. The reversal of 221419836722 is 227638914122.

221419836722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 116800581121 + 104619255601 = 341761^2 + 323449^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=332731.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221419836727) 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 8 ways as a sum of consecutive naturals, for example, 4634468 + ... + 4682000.

Almost surely, 2^221419836722 is an apocalyptic number.

221419836722 is a deficient number, since it is larger than the sum of its proper divisors (164943312811).

221419836722 is an frugal number, since it uses more digits than its factorization.

221419836722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95082 (or 47542 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The spelling of 221419836722 in words is "two hundred twenty-one billion, four hundred nineteen million, eight hundred thirty-six thousand, seven hundred twenty-two".