1121100456 has 64 divisors (see below), whose sum is σ = 3255684480. Its totient is φ = 315060480.

The previous prime is 1121100427. The next prime is 1121100457. The reversal of 1121100456 is 6540011211.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1121100457) 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, 44451 + ... + 64946.

It is an arithmetic number, because the mean of its divisors is an integer number (50870070).

Almost surely, 2^1121100456 is an apocalyptic number.

It is an amenable number.

1121100456 is an abundant number, since it is smaller than the sum of its proper divisors (2134584024).

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

1121100456 is a wasteful number, since it uses less digits than its factorization.

1121100456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109474 (or 109470 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 1121100456 is about 33482.8382309505. The cubic root of 1121100456 is about 1038.8388347061.

Adding to 1121100456 its reverse (6540011211), we get a palindrome (7661111667).

The spelling of 1121100456 in words is "one billion, one hundred twenty-one million, one hundred thousand, four hundred fifty-six".