1121304400 has 60 divisors (see below), whose sum is σ = 2697165664. Its totient is φ = 447984000.

The previous prime is 1121304307. The next prime is 1121304413. The reversal of 1121304400 is 44031211.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611485 + ... + 613315.

Almost surely, 2^1121304400 is an apocalyptic number.

1121304400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121304400 is an abundant number, since it is smaller than the sum of its proper divisors (1575861264).

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

1121304400 is a wasteful number, since it uses less digits than its factorization.

1121304400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3380 (or 3369 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1121304400 is about 33485.8835929411. The cubic root of 1121304400 is about 1038.9018240367.

Adding to 1121304400 its reverse (44031211), we get a palindrome (1165335611).

The spelling of 1121304400 in words is "one billion, one hundred twenty-one million, three hundred four thousand, four hundred".