1223255440000 has 320 divisors, whose sum is σ = 3355191370080. Its totient is φ = 440384000000.

The previous prime is 1223255439977. The next prime is 1223255440019. The reversal of 1223255440000 is 445523221.

It is a tau number, because it is divible by the number of its divisors (320).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 88873119 + ... + 88886881.

Almost surely, 2^{1223255440000} is an apocalyptic number.

1223255440000 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 1223255440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1677595685040).

1223255440000 is an abundant number, since it is smaller than the sum of its proper divisors (2131935930080).

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

1223255440000 is a wasteful number, since it uses less digits than its factorization.

1223255440000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13909 (or 13882 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The spelling of 1223255440000 in words is "one trillion, two hundred twenty-three billion, two hundred fifty-five million, four hundred forty thousand".