212221222011 has 24 divisors (see below), whose sum is σ = 314853389760. Its totient is φ = 137645329536.

The previous prime is 212221222009. The next prime is 212221222027. The reversal of 212221222011 is 110222122212.

It is a happy number.

212221222011 is a `hidden beast` number, since 212 + 221 + 2 + 220 + 11 = 666.

It is not a de Polignac number, because 212221222011 - 2¹ = 212221222009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212221222091) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5762191 + ... + 5798903.

It is an arithmetic number, because the mean of its divisors is an integer number (13118891240).

Almost surely, 2^212221222011 is an apocalyptic number.

212221222011 is a deficient number, since it is larger than the sum of its proper divisors (102632167749).

212221222011 is a wasteful number, since it uses less digits than its factorization.

212221222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54115 (or 54112 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212221222011 its reverse (110222122212), we get a palindrome (322443344223).

The spelling of 212221222011 in words is "two hundred twelve billion, two hundred twenty-one million, two hundred twenty-two thousand, eleven".