1121228167 has 4 divisors (see below), whose sum is σ = 1126256320. Its totient is φ = 1116200016.

The previous prime is 1121228111. The next prime is 1121228179. The reversal of 1121228167 is 7618221211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121228167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121228267) 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, 2513742 + ... + 2514187.

It is an arithmetic number, because the mean of its divisors is an integer number (281564080).

Almost surely, 2^1121228167 is an apocalyptic number.

1121228167 is a deficient number, since it is larger than the sum of its proper divisors (5028153).

1121228167 is an equidigital number, since it uses as much as digits as its factorization.

1121228167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5028152.

The product of its digits is 2688, while the sum is 31.

The square root of 1121228167 is about 33484.7452879666. The cubic root of 1121228167 is about 1038.8782799103.

Adding to 1121228167 its reverse (7618221211), we get a palindrome (8739449378).

The spelling of 1121228167 in words is "one billion, one hundred twenty-one million, two hundred twenty-eight thousand, one hundred sixty-seven".