1115222211 has 12 divisors (see below), whose sum is σ = 1613564680. Its totient is φ = 742240800.

The previous prime is 1115222209. The next prime is 1115222249. The reversal of 1115222211 is 1122225111.

1115222211 is a `hidden beast` number, since 111 + 522 + 22 + 11 = 666.

It is not a de Polignac number, because 1115222211 - 2¹ = 1115222209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115222261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97681 + ... + 108498.

Almost surely, 2^1115222211 is an apocalyptic number.

1115222211 is a deficient number, since it is larger than the sum of its proper divisors (498342469).

1115222211 is a wasteful number, since it uses less digits than its factorization.

1115222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206786 (or 206783 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 1115222211 is about 33394.9428955942. The cubic root of 1115222211 is about 1037.0200107294.

Adding to 1115222211 its reverse (1122225111), we get a palindrome (2237447322).

The spelling of 1115222211 in words is "one billion, one hundred fifteen million, two hundred twenty-two thousand, two hundred eleven".