221210222222 has 8 divisors (see below), whose sum is σ = 361980363672. Its totient is φ = 100550101000.

The previous prime is 221210222197. The next prime is 221210222237. The reversal of 221210222222 is 222222012122.

It is a sphenic number, since it is the product of 3 distinct primes.

221210222222 is a modest number, since divided by 222222 gives 221210 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 221210222194 and 221210222203.

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, 5027505029 + ... + 5027505072.

It is an arithmetic number, because the mean of its divisors is an integer number (45247545459).

Almost surely, 2^221210222222 is an apocalyptic number.

221210222222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221210222222 is a deficient number, since it is larger than the sum of its proper divisors (140770141450).

221210222222 is a wasteful number, since it uses less digits than its factorization.

221210222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10055010114.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221210222222 its reverse (222222012122), we get a palindrome (443432234344).

The spelling of 221210222222 in words is "two hundred twenty-one billion, two hundred ten million, two hundred twenty-two thousand, two hundred twenty-two".