1222222221111 has 8 divisors (see below), whose sum is σ = 1673673672304. Its totient is φ = 792792792000.

The previous prime is 1222222221109. The next prime is 1222222221139. The reversal of 1222222221111 is 1111222222221.

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

It is not a de Polignac number, because 1222222221111 - 2¹ = 1222222221109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222222221191) 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, 5505505390 + ... + 5505505611.

It is an arithmetic number, because the mean of its divisors is an integer number (209209209038).

Almost surely, 2^{1222222221111} is an apocalyptic number.

1222222221111 is a deficient number, since it is larger than the sum of its proper divisors (451451451193).

1222222221111 is a wasteful number, since it uses less digits than its factorization.

1222222221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11011011041.

The product of its digits is 256, while the sum is 21.

Adding to 1222222221111 its reverse (1111222222221), we get a palindrome (2333444443332).

It can be divided in two parts, 1222222221 and 111, that multiplied together give a palindrome (135666666531).

The spelling of 1222222221111 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred eleven".