1122111211 has 16 divisors (see below), whose sum is σ = 1217853504. Its totient is φ = 1027753344.

The previous prime is 1122111209. The next prime is 1122111233. The reversal of 1122111211 is 1121112211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1122111211 - 2¹ = 1122111209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1122111191 and 1122111200.

It is not an unprimeable number, because it can be changed into a prime (1122111271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1141026 + ... + 1142008.

It is an arithmetic number, because the mean of its divisors is an integer number (76115844).

Almost surely, 2^1122111211 is an apocalyptic number.

1122111211 is a deficient number, since it is larger than the sum of its proper divisors (95742293).

1122111211 is a wasteful number, since it uses less digits than its factorization.

1122111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590.

The product of its digits is 8, while the sum is 13.

The square root of 1122111211 is about 33497.9284583390. The cubic root of 1122111211 is about 1039.1509376179.

Adding to 1122111211 its reverse (1121112211), we get a palindrome (2243223422).

The spelling of 1122111211 in words is "one billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eleven".