221120102212 has 24 divisors (see below), whose sum is σ = 410635121400. Its totient is φ = 103824752640.

The previous prime is 221120102207. The next prime is 221120102221. The reversal of 221120102212 is 212201021122.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 78912675396 + 142207426816 = 280914^2 + 377104^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3590589 + ... + 3651652.

It is an arithmetic number, because the mean of its divisors is an integer number (17109796725).

Almost surely, 2^221120102212 is an apocalyptic number.

It is an amenable number.

221120102212 is a deficient number, since it is larger than the sum of its proper divisors (189515019188).

221120102212 is a wasteful number, since it uses less digits than its factorization.

221120102212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7242711 (or 7242709 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221120102212 its reverse (212201021122), we get a palindrome (433321123334).

The spelling of 221120102212 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred two thousand, two hundred twelve".