1111220022221 has 8 divisors (see below), whose sum is σ = 1116401583360. Its totient is φ = 1106040233952.

The previous prime is 1111220022193. The next prime is 1111220022223. The reversal of 1111220022221 is 1222200221111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111220022221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1111220022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111220022223) 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, 821681 + ... + 1702233.

It is an arithmetic number, because the mean of its divisors is an integer number (139550197920).

Almost surely, 2^{1111220022221} is an apocalyptic number.

It is an amenable number.

1111220022221 is a deficient number, since it is larger than the sum of its proper divisors (5181561139).

1111220022221 is an equidigital number, since it uses as much as digits as its factorization.

1111220022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886435.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1111220022221 its reverse (1222200221111), we get a palindrome (2333420243332).

The spelling of 1111220022221 in words is "one trillion, one hundred eleven billion, two hundred twenty million, twenty-two thousand, two hundred twenty-one".