1121443992 has 48 divisors (see below), whose sum is σ = 3197103000. Its totient is φ = 354139776.

The previous prime is 1121443991. The next prime is 1121444021. The reversal of 1121443992 is 2993441211.

1121443992 is a `hidden beast` number, since 1 + 1 + 214 + 439 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121443991) 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, 408517 + ... + 411252.

Almost surely, 2^1121443992 is an apocalyptic number.

1121443992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121443992 is an abundant number, since it is smaller than the sum of its proper divisors (2075659008).

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

1121443992 is a wasteful number, since it uses less digits than its factorization.

1121443992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819800 (or 819793 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 1121443992 is about 33487.9678690720. The cubic root of 1121443992 is about 1038.9449334623.

The spelling of 1121443992 in words is "one billion, one hundred twenty-one million, four hundred forty-three thousand, nine hundred ninety-two".