1121312106 has 32 divisors (see below), whose sum is σ = 2492899200. Its totient is φ = 373606560.

The previous prime is 1121312089. The next prime is 1121312107. The reversal of 1121312106 is 6012131211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1121312107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234750 + ... + 239478.

It is an arithmetic number, because the mean of its divisors is an integer number (77903100).

Almost surely, 2^1121312106 is an apocalyptic number.

1121312106 is an abundant number, since it is smaller than the sum of its proper divisors (1371587094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121312106 is a wasteful number, since it uses less digits than its factorization.

1121312106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9131 (or 9125 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 1121312106 is about 33485.9986561548. The cubic root of 1121312106 is about 1038.9042039313.

Adding to 1121312106 its reverse (6012131211), we get a palindrome (7133443317).

The spelling of 1121312106 in words is "one billion, one hundred twenty-one million, three hundred twelve thousand, one hundred six".