1200331031100 has 144 divisors (see below), whose sum is σ = 3626066750208. Its totient is φ = 305993064960.

The previous prime is 1200331031083. The next prime is 1200331031117. The reversal of 1200331031100 is 11301330021.

It is an interprime number because it is at equal distance from previous prime (1200331031083) and next prime (1200331031117).

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 1200331031100.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 12004512 + ... + 12104088.

Almost surely, 2^{1200331031100} is an apocalyptic number.

1200331031100 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 1200331031100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1813033375104).

1200331031100 is an abundant number, since it is smaller than the sum of its proper divisors (2425735719108).

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

1200331031100 is a wasteful number, since it uses less digits than its factorization.

1200331031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101364 (or 101357 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 15.

Adding to 1200331031100 its reverse (11301330021), we get a palindrome (1211632361121).

The spelling of 1200331031100 in words is "one trillion, two hundred billion, three hundred thirty-one million, thirty-one thousand, one hundred".