221221033422 has 32 divisors (see below), whose sum is σ = 468499388832. Its totient is φ = 69398037504.

The previous prime is 221221033393. The next prime is 221221033433. The reversal of 221221033422 is 224330122122.

221221033422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221221033392 and 221221033401.

It is a congruent number.

It is an unprimeable number.

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, 1663548 + ... + 1791600.

It is an arithmetic number, because the mean of its divisors is an integer number (14640605901).

Almost surely, 2^221221033422 is an apocalyptic number.

221221033422 is an abundant number, since it is smaller than the sum of its proper divisors (247278355410).

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

221221033422 is a wasteful number, since it uses less digits than its factorization.

221221033422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145012.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221221033422 its reverse (224330122122), we get a palindrome (445551155544).

The spelling of 221221033422 in words is "two hundred twenty-one billion, two hundred twenty-one million, thirty-three thousand, four hundred twenty-two".