1111221221222 has 16 divisors (see below), whose sum is σ = 1905019234080. Its totient is φ = 476220523968.

The previous prime is 1111221221207. The next prime is 1111221221249. The reversal of 1111221221222 is 2221221221111.

It is a super-2 number, since 2×1111221221222² (a number of 25 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 1111221221194 and 1111221221203.

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, 1021697 + ... + 1807292.

It is an arithmetic number, because the mean of its divisors is an integer number (119063702130).

Almost surely, 2^{1111221221222} is an apocalyptic number.

1111221221222 is a deficient number, since it is larger than the sum of its proper divisors (793798012858).

1111221221222 is a wasteful number, since it uses less digits than its factorization.

1111221221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857055.

The product of its digits is 128, while the sum is 20.

Adding to 1111221221222 its reverse (2221221221111), we get a palindrome (3332442442333).

The spelling of 1111221221222 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty-two".