221021022122212 has 72 divisors (see below), whose sum is σ = 430115685147456. Its totient is φ = 99277678491264.

The previous prime is 221021022122141. The next prime is 221021022122233. The reversal of 221021022122212 is 212221220120122.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5673048 + ... + 21776719.

Almost surely, 2^{221021022122212} is an apocalyptic number.

It is an amenable number.

221021022122212 is a deficient number, since it is larger than the sum of its proper divisors (209094663025244).

221021022122212 is a wasteful number, since it uses less digits than its factorization.

221021022122212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27450117 (or 27450102 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 221021022122212 its reverse (212221220120122), we get a palindrome (433242242242334).

The spelling of 221021022122212 in words is "two hundred twenty-one trillion, twenty-one billion, twenty-two million, one hundred twenty-two thousand, two hundred twelve".