1227123813888 has 320 divisors, whose sum is σ = 4294439424000. Its totient is φ = 338516140032.

The previous prime is 1227123813847. The next prime is 1227123813889. The reversal of 1227123813888 is 8883183217221.

It is a happy number.

1227123813888 is a `hidden beast` number, since 1 + 2 + 27 + 1 + 238 + 1 + 388 + 8 = 666.

It is a super-3 number, since 3×1227123813888³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227123813889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2587633 + ... + 3024911.

It is an arithmetic number, because the mean of its divisors is an integer number (13420123200).

Almost surely, 2^{1227123813888} is an apocalyptic number.

1227123813888 is a gapful number since it is divisible by the number (18) 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 1227123813888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2147219712000).

1227123813888 is an abundant number, since it is smaller than the sum of its proper divisors (3067315610112).

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

1227123813888 is an equidigital number, since it uses as much as digits as its factorization.

1227123813888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437342 (or 437320 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The spelling of 1227123813888 in words is "one trillion, two hundred twenty-seven billion, one hundred twenty-three million, eight hundred thirteen thousand, eight hundred eighty-eight".