1222220222221 has 8 divisors (see below), whose sum is σ = 1231043889600. Its totient is φ = 1213396993920.

The previous prime is 1222220222191. The next prime is 1222220222227.

1222220222221 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 1222220222221 - 2⁹ = 1222220221709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222220222192 and 1222220222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222220222227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7251576 + ... + 7418206.

It is an arithmetic number, because the mean of its divisors is an integer number (153880486200).

Almost surely, 2^{1222220222221} is an apocalyptic number.

It is an amenable number.

1222220222221 is a deficient number, since it is larger than the sum of its proper divisors (8823667379).

1222220222221 is a wasteful number, since it uses less digits than its factorization.

1222220222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219539.

The product of its (nonzero) digits is 1024, while the sum is 22.

Multiplying 1222220222221 by its sum of digits (22), we get a palindrome (26888844888862).

It can be divided in two parts, 1222220 and 222221, that added together give a palindrome (1444441).

The spelling of 1222220222221 in words is "one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty-one".