211221222101212 has 12 divisors (see below), whose sum is σ = 371494611737200. Its totient is φ = 105079904462016.

The previous prime is 211221222101143. The next prime is 211221222101333. The reversal of 211221222101212 is 212101222122112.

It is a super-2 number, since 2×211221222101212² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132676646253 + ... + 132676647844.

Almost surely, 2^{211221222101212} is an apocalyptic number.

It is an amenable number.

211221222101212 is a deficient number, since it is larger than the sum of its proper divisors (160273389635988).

211221222101212 is a wasteful number, since it uses less digits than its factorization.

211221222101212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265353294300 (or 265353294298 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 211221222101212 its reverse (212101222122112), we get a palindrome (423322444223324).

The spelling of 211221222101212 in words is "two hundred eleven trillion, two hundred twenty-one billion, two hundred twenty-two million, one hundred one thousand, two hundred twelve".