1111222229 has 4 divisors (see below), whose sum is σ = 1196700876. Its totient is φ = 1025743584.

The previous prime is 1111222223. The next prime is 1111222247. The reversal of 1111222229 is 9222221111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9222221111 = 14627 ⋅630493.

It can be written as a sum of positive squares in 2 ways, for example, as 164429329 + 946792900 = 12823^2 + 30770^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111222229 - 2⁴ = 1111222213 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111222223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42739304 + ... + 42739329.

It is an arithmetic number, because the mean of its divisors is an integer number (299175219).

Almost surely, 2^1111222229 is an apocalyptic number.

It is an amenable number.

1111222229 is a deficient number, since it is larger than the sum of its proper divisors (85478647).

1111222229 is an equidigital number, since it uses as much as digits as its factorization.

1111222229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85478646.

The product of its digits is 288, while the sum is 23.

The square root of 1111222229 is about 33335.0000599970. Note that the first 4 decimals coincide. The cubic root of 1111222229 is about 1035.7786944120.

The spelling of 1111222229 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-nine".