1121234400 has 720 divisors, whose sum is σ = 4843471248. Its totient is φ = 250905600.

The previous prime is 1121234393. The next prime is 1121234423. The reversal of 1121234400 is 44321211.

1121234400 is a `hidden beast` number, since 11 + 21 + 234 + 400 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 86248794 + ... + 86248806.

Almost surely, 2^1121234400 is an apocalyptic number.

1121234400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121234400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2421735624).

1121234400 is an abundant number, since it is smaller than the sum of its proper divisors (3722236848).

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

1121234400 is a wasteful number, since it uses less digits than its factorization.

1121234400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1121234400 is about 33484.8383600698. The cubic root of 1121234400 is about 1038.8802049768.

Adding to 1121234400 its reverse (44321211), we get a palindrome (1165555611).

The spelling of 1121234400 in words is "one billion, one hundred twenty-one million, two hundred thirty-four thousand, four hundred".