221212002222 has 48 divisors (see below), whose sum is σ = 481443086592. Its totient is φ = 73406969280.

The previous prime is 221212002199. The next prime is 221212002227. The reversal of 221212002222 is 222200212122.

221212002222 is a `hidden beast` number, since 221 + 21 + 200 + 2 + 222 = 666.

It is a super-2 number, since 2×221212002222² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221212002195 and 221212002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221212002227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5869683 + ... + 5907249.

It is an arithmetic number, because the mean of its divisors is an integer number (10030064304).

Almost surely, 2^221212002222 is an apocalyptic number.

221212002222 is an abundant number, since it is smaller than the sum of its proper divisors (260231084370).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221212002222 is a wasteful number, since it uses less digits than its factorization.

221212002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39033 (or 39030 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221212002222 its reverse (222200212122), we get a palindrome (443412214344).

The spelling of 221212002222 in words is "two hundred twenty-one billion, two hundred twelve million, two thousand, two hundred twenty-two".