221232344212 has 24 divisors (see below), whose sum is σ = 424105178112. Its totient is φ = 100142889600.

The previous prime is 221232344197. The next prime is 221232344233. The reversal of 221232344212 is 212443232122.

It is a super-3 number, since 3×221232344212³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10420948 + ... + 10442155.

It is an arithmetic number, because the mean of its divisors is an integer number (17671049088).

Almost surely, 2^221232344212 is an apocalyptic number.

221232344212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221232344212 is a deficient number, since it is larger than the sum of its proper divisors (202872833900).

221232344212 is a wasteful number, since it uses less digits than its factorization.

221232344212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20863359 (or 20863357 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

Adding to 221232344212 its reverse (212443232122), we get a palindrome (433675576334).

The spelling of 221232344212 in words is "two hundred twenty-one billion, two hundred thirty-two million, three hundred forty-four thousand, two hundred twelve".