1121555124 has 36 divisors (see below), whose sum is σ = 2837103360. Its totient is φ = 373579920.

The previous prime is 1121555087. The next prime is 1121555129. The reversal of 1121555124 is 4215551211.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121555129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42367 + ... + 63545.

Almost surely, 2^1121555124 is an apocalyptic number.

It is an amenable number.

1121555124 is an abundant number, since it is smaller than the sum of its proper divisors (1715548236).

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

1121555124 is a wasteful number, since it uses less digits than its factorization.

1121555124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22660 (or 22655 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1121555124 is about 33489.6271104950. The cubic root of 1121555124 is about 1038.9792511858.

The spelling of 1121555124 in words is "one billion, one hundred twenty-one million, five hundred fifty-five thousand, one hundred twenty-four".