221012022222 has 12 divisors (see below), whose sum is σ = 478859381520. Its totient is φ = 73670674068.

The previous prime is 221012022173. The next prime is 221012022299. The reversal of 221012022222 is 222220210122.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12278445679 = 221012022222 / (2 + 2 + 1 + 0 + 1 + 2 + 0 + 2 + 2 + 2 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 221012022195 and 221012022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6139222822 + ... + 6139222857.

It is an arithmetic number, because the mean of its divisors is an integer number (39904948460).

Almost surely, 2^221012022222 is an apocalyptic number.

221012022222 is an abundant number, since it is smaller than the sum of its proper divisors (257847359298).

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

221012022222 is a wasteful number, since it uses less digits than its factorization.

221012022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12278445687 (or 12278445684 counting only the distinct ones).

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

Adding to 221012022222 its reverse (222220210122), we get a palindrome (443232232344).

The spelling of 221012022222 in words is "two hundred twenty-one billion, twelve million, twenty-two thousand, two hundred twenty-two".