1121380918 has 32 divisors (see below), whose sum is σ = 2030561280. Its totient is φ = 454265280.

The previous prime is 1121380913. The next prime is 1121380919. The reversal of 1121380918 is 8190831211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121380913) 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, 11383 + ... + 48706.

It is an arithmetic number, because the mean of its divisors is an integer number (63455040).

Almost surely, 2^1121380918 is an apocalyptic number.

1121380918 is a deficient number, since it is larger than the sum of its proper divisors (909180362).

1121380918 is a wasteful number, since it uses less digits than its factorization.

1121380918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60172.

The product of its (nonzero) digits is 3456, while the sum is 34.

The square root of 1121380918 is about 33487.0261146015. The cubic root of 1121380918 is about 1038.9254551106.

The spelling of 1121380918 in words is "one billion, one hundred twenty-one million, three hundred eighty thousand, nine hundred eighteen".