123210640000 has 160 divisors (see below), whose sum is σ = 350544664800. Its totient is φ = 42243456000.

The previous prime is 123210639971. The next prime is 123210640039. The reversal of 123210640000 is 46012321.

It is a tau number, because it is divible by the number of its divisors (160).

It is a self number, because there is not a number n which added to its sum of digits gives 123210640000.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 449991 + ... + 670009.

It is an arithmetic number, because the mean of its divisors is an integer number (2190904155).

Almost surely, 2^123210640000 is an apocalyptic number.

123210640000 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 123210640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175272332400).

123210640000 is an abundant number, since it is smaller than the sum of its proper divisors (227334024800).

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

123210640000 is an frugal number, since it uses more digits than its factorization.

123210640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220060 (or 220033 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 123210640000 its reverse (46012321), we get a palindrome (123256652321).

The spelling of 123210640000 in words is "one hundred twenty-three billion, two hundred ten million, six hundred forty thousand".