1320123300 has 72 divisors (see below), whose sum is σ = 3865648416. Its totient is φ = 347784960.

The previous prime is 1320123283. The next prime is 1320123323. The reversal of 1320123300 is 33210231.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1320123300.

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 23 ways as a sum of consecutive naturals, for example, 1609 + ... + 51408.

Almost surely, 2^1320123300 is an apocalyptic number.

1320123300 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 1320123300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1932824208).

1320123300 is an abundant number, since it is smaller than the sum of its proper divisors (2545525116).

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

1320123300 is a wasteful number, since it uses less digits than its factorization.

1320123300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53117 (or 53110 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 1320123300 is about 36333.5010699492. The cubic root of 1320123300 is about 1096.9954648094.

Adding to 1320123300 its reverse (33210231), we get a palindrome (1353333531).

The spelling of 1320123300 in words is "one billion, three hundred twenty million, one hundred twenty-three thousand, three hundred".