221020022021212 has 12 divisors (see below), whose sum is σ = 386859463249000. Its totient is φ = 110488746807216.

The previous prime is 221020022021177. The next prime is 221020022021243. The reversal of 221020022021212 is 212120220020122.

It is a self number, because there is not a number n which added to its sum of digits gives 221020022021212.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 5316027462 + ... + 5316069037.

Almost surely, 2^{221020022021212} is an apocalyptic number.

It is an amenable number.

221020022021212 is a deficient number, since it is larger than the sum of its proper divisors (165839441227788).

221020022021212 is a wasteful number, since it uses less digits than its factorization.

221020022021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10632101700 (or 10632101698 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221020022021212 its reverse (212120220020122), we get a palindrome (433140242041334).

The spelling of 221020022021212 in words is "two hundred twenty-one trillion, twenty billion, twenty-two million, twenty-one thousand, two hundred twelve".