1223123065560 has 1280 divisors, whose sum is σ = 4881619353600. Its totient is φ = 271593907200.

The previous prime is 1223123065487. The next prime is 1223123065621. The reversal of 1223123065560 is 655603213221.

1223123065560 is a `hidden beast` number, since 1 + 2 + 2 + 3 + 1 + 2 + 30 + 65 + 560 = 666.

It is a super-2 number, since 2×1223123065560² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 3227237451 + ... + 3227237829.

It is an arithmetic number, because the mean of its divisors is an integer number (3813765120).

Almost surely, 2^{1223123065560} is an apocalyptic number.

1223123065560 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 1223123065560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2440809676800).

1223123065560 is an abundant number, since it is smaller than the sum of its proper divisors (3658496288040).

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

1223123065560 is a wasteful number, since it uses less digits than its factorization.

1223123065560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 581 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

Adding to 1223123065560 its reverse (655603213221), we get a palindrome (1878726278781).

The spelling of 1223123065560 in words is "one trillion, two hundred twenty-three billion, one hundred twenty-three million, sixty-five thousand, five hundred sixty".