1232123317920 has 768 divisors, whose sum is σ = 5167469260800. Its totient is φ = 270667837440.

The previous prime is 1232123317903. The next prime is 1232123317967. The reversal of 1232123317920 is 297133212321.

It is a happy number.

1232123317920 is a `hidden beast` number, since 1 + 2 + 321 + 233 + 17 + 92 + 0 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20736574 + ... + 20795906.

It is an arithmetic number, because the mean of its divisors is an integer number (6728475600).

Almost surely, 2^{1232123317920} is an apocalyptic number.

1232123317920 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 1232123317920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2583734630400).

1232123317920 is an abundant number, since it is smaller than the sum of its proper divisors (3935345942880).

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

1232123317920 is a wasteful number, since it uses less digits than its factorization.

1232123317920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59410 (or 59396 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 1232123317920 in words is "one trillion, two hundred thirty-two billion, one hundred twenty-three million, three hundred seventeen thousand, nine hundred twenty".