1320203210100 has 72 divisors (see below), whose sum is σ = 3848946755808. Its totient is φ = 349366742400.

The previous prime is 1320203210099. The next prime is 1320203210149. The reversal of 1320203210100 is 10123020231.

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 1320203210100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16757179 + ... + 16835778.

Almost surely, 2^{1320203210100} is an apocalyptic number.

1320203210100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320203210100 is an abundant number, since it is smaller than the sum of its proper divisors (2528743545708).

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

1320203210100 is a wasteful number, since it uses less digits than its factorization.

1320203210100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33593105 (or 33593098 counting only the distinct ones).

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

Adding to 1320203210100 its reverse (10123020231), we get a palindrome (1330326230331).

The spelling of 1320203210100 in words is "one trillion, three hundred twenty billion, two hundred three million, two hundred ten thousand, one hundred".