221021011222 has 16 divisors (see below), whose sum is σ = 365399313552. Its totient is φ = 99428382720.

The previous prime is 221021011213. The next prime is 221021011331. The reversal of 221021011222 is 222110120122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221021011196 and 221021011205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51783483 + ... + 51787750.

It is an arithmetic number, because the mean of its divisors is an integer number (22837457097).

Almost surely, 2^221021011222 is an apocalyptic number.

221021011222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221021011222 is a deficient number, since it is larger than the sum of its proper divisors (144378302330).

221021011222 is a wasteful number, since it uses less digits than its factorization.

221021011222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103571343.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221021011222 its reverse (222110120122), we get a palindrome (443131131344).

The spelling of 221021011222 in words is "two hundred twenty-one billion, twenty-one million, eleven thousand, two hundred twenty-two".