1121043323400 has 1536 divisors, whose sum is σ = 4876607877120. Its totient is φ = 205535232000.

The previous prime is 1121043323371. The next prime is 1121043323447. The reversal of 1121043323400 is 43233401211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 1355553787 + ... + 1355554613.

It is an arithmetic number, because the mean of its divisors is an integer number (3174874920).

Almost surely, 2^{1121043323400} is an apocalyptic number.

1121043323400 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 1121043323400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2438303938560).

1121043323400 is an abundant number, since it is smaller than the sum of its proper divisors (3755564553720).

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

1121043323400 is a wasteful number, since it uses less digits than its factorization.

1121043323400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 966 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1121043323400 its reverse (43233401211), we get a palindrome (1164276724611).

The spelling of 1121043323400 in words is "one trillion, one hundred twenty-one billion, forty-three million, three hundred twenty-three thousand, four hundred".