1121222222 has 4 divisors (see below), whose sum is σ = 1681833336. Its totient is φ = 560611110.

The previous prime is 1121222213. The next prime is 1121222227. The reversal of 1121222222 is 2222221211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2222221211 = 7 ⋅317460173.

It is a super-2 number, since 2×1121222222² = 2514278542213234568, which contains 22 as substring.

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

1121222222 is a modest number, since divided by 22222 gives 11212 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1121222222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121222227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280305554 + ... + 280305557.

It is an arithmetic number, because the mean of its divisors is an integer number (420458334).

Almost surely, 2^1121222222 is an apocalyptic number.

1121222222 is a deficient number, since it is larger than the sum of its proper divisors (560611114).

1121222222 is an equidigital number, since it uses as much as digits as its factorization.

1121222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560611113.

The product of its digits is 128, while the sum is 17.

The square root of 1121222222 is about 33484.6565160821. The cubic root of 1121222222 is about 1038.8764437861.

Adding to 1121222222 its reverse (2222221211), we get a palindrome (3343443433).

The spelling of 1121222222 in words is "one billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred twenty-two".