221200222011212 has 12 divisors (see below), whose sum is σ = 387102561669936. Its totient is φ = 110599490105520.

The previous prime is 221200222011211. The next prime is 221200222011247. The reversal of 221200222011212 is 212110222002122.

It is not an unprimeable number, because it can be changed into a prime (221200222011211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154422983 + ... + 155848830.

It is an arithmetic number, because the mean of its divisors is an integer number (32258546805828).

Almost surely, 2^{221200222011212} is an apocalyptic number.

It is an amenable number.

221200222011212 is a deficient number, since it is larger than the sum of its proper divisors (165902339658724).

221200222011212 is a wasteful number, since it uses less digits than its factorization.

221200222011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310450048 (or 310450046 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 221200222011212 its reverse (212110222002122), we get a palindrome (433310444013334).

The spelling of 221200222011212 in words is "two hundred twenty-one trillion, two hundred billion, two hundred twenty-two million, eleven thousand, two hundred twelve".