131121220200 has 96 divisors (see below), whose sum is σ = 413139435360. Its totient is φ = 34392441600.

The previous prime is 131121220183. The next prime is 131121220213. The reversal of 131121220200 is 2022121131.

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 131121220200.

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, 1754674 + ... + 1827873.

It is an arithmetic number, because the mean of its divisors is an integer number (4303535785).

Almost surely, 2^131121220200 is an apocalyptic number.

131121220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131121220200 is an abundant number, since it is smaller than the sum of its proper divisors (282018215160).

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

131121220200 is a wasteful number, since it uses less digits than its factorization.

131121220200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582627 (or 3582618 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 131121220200 its reverse (2022121131), we get a palindrome (133143341331).

The spelling of 131121220200 in words is "one hundred thirty-one billion, one hundred twenty-one million, two hundred twenty thousand, two hundred".