1121223312000 has 768 divisors, whose sum is σ = 4415961888000. Its totient is φ = 270369792000.

The previous prime is 1121223311987. The next prime is 1121223312029. The reversal of 1121223312000 is 2133221211.

1121223312000 is a `hidden beast` number, since 1 + 12 + 122 + 331 + 200 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 315214222 + ... + 315217778.

It is an arithmetic number, because the mean of its divisors is an integer number (5749950375).

Almost surely, 2^{1121223312000} is an apocalyptic number.

1121223312000 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 1121223312000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207980944000).

1121223312000 is an abundant number, since it is smaller than the sum of its proper divisors (3294738576000).

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

1121223312000 is a wasteful number, since it uses less digits than its factorization.

1121223312000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802 (or 3777 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1121223312000 its reverse (2133221211), we get a palindrome (1123356533211).

The spelling of 1121223312000 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-three million, three hundred twelve thousand".