1323210120 has 32 divisors (see below), whose sum is σ = 3969630720. Its totient is φ = 352856000.

The previous prime is 1323210089. The next prime is 1323210121. The reversal of 1323210120 is 210123231.

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 1323210120.

It is not an unprimeable number, because it can be changed into a prime (1323210121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5513256 + ... + 5513495.

It is an arithmetic number, because the mean of its divisors is an integer number (124050960).

Almost surely, 2^1323210120 is an apocalyptic number.

1323210120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1323210120 is an abundant number, since it is smaller than the sum of its proper divisors (2646420600).

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

1323210120 is a wasteful number, since it uses less digits than its factorization.

1323210120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11026765 (or 11026761 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1323210120 is about 36375.9552451891. The cubic root of 1323210120 is about 1097.8498273390.

Adding to 1323210120 its reverse (210123231), we get a palindrome (1533333351).

The spelling of 1323210120 in words is "one billion, three hundred twenty-three million, two hundred ten thousand, one hundred twenty".