1121223211 has 4 divisors (see below), whose sum is σ = 1145079072. Its totient is φ = 1097367352.

The previous prime is 1121223199. The next prime is 1121223223. The reversal of 1121223211 is 1123221211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1123221211 = 7 ⋅160460173.

It is an interprime number because it is at equal distance from previous prime (1121223199) and next prime (1121223223).

It is a cyclic number.

It is not a de Polignac number, because 1121223211 - 2¹¹ = 1121221163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121223911) 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, 11927860 + ... + 11927953.

It is an arithmetic number, because the mean of its divisors is an integer number (286269768).

Almost surely, 2^1121223211 is an apocalyptic number.

1121223211 is a deficient number, since it is larger than the sum of its proper divisors (23855861).

1121223211 is an equidigital number, since it uses as much as digits as its factorization.

1121223211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23855860.

The product of its digits is 48, while the sum is 16.

The square root of 1121223211 is about 33484.6712840368. The cubic root of 1121223211 is about 1038.8767492410.

Adding to 1121223211 its reverse (1123221211), we get a palindrome (2244444422).

The spelling of 1121223211 in words is "one billion, one hundred twenty-one million, two hundred twenty-three thousand, two hundred eleven".