123020321000 has 64 divisors (see below), whose sum is σ = 288043938000. Its totient is φ = 49177977600.

The previous prime is 123020320993. The next prime is 123020321071. The reversal of 123020321000 is 123020321.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1934416324 + 121085904676 = 43982^2 + 347974^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1632146 + ... + 1705854.

Almost surely, 2^123020321000 is an apocalyptic number.

123020321000 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 123020321000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (144021969000).

123020321000 is an abundant number, since it is smaller than the sum of its proper divisors (165023617000).

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

123020321000 is a wasteful number, since it uses less digits than its factorization.

123020321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75399 (or 75385 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 123020321000 its reverse (123020321), we get a palindrome (123143341321).

123020321000 divided by its reverse (123020321) gives a cube (1000 = 10³).

The spelling of 123020321000 in words is "one hundred twenty-three billion, twenty million, three hundred twenty-one thousand".