320121200100 has 72 divisors (see below), whose sum is σ = 997464838720. Its totient is φ = 78799063680.

The previous prime is 320121200051. The next prime is 320121200129. The reversal of 320121200100 is 1002121023.

It is a super-3 number, since 3×320121200100³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 41037280 + ... + 41045079.

Almost surely, 2^320121200100 is an apocalyptic number.

320121200100 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320121200100 is an abundant number, since it is smaller than the sum of its proper divisors (677343638620).

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

320121200100 is a wasteful number, since it uses less digits than its factorization.

320121200100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82082389 (or 82082382 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 320121200100 its reverse (1002121023), we get a palindrome (321123321123).

The spelling of 320121200100 in words is "three hundred twenty billion, one hundred twenty-one million, two hundred thousand, one hundred".