133100021200 has 60 divisors (see below), whose sum is σ = 321169409740. Its totient is φ = 53007482880.

The previous prime is 133100021167. The next prime is 133100021203. The reversal of 133100021200 is 2120001331.

It can be written as a sum of positive squares in 6 ways, for example, as 1014295104 + 132085726096 = 31848^2 + 363436^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133100021203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634929 + ... + 818128.

Almost surely, 2^133100021200 is an apocalyptic number.

133100021200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133100021200 is an abundant number, since it is smaller than the sum of its proper divisors (188069388540).

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

133100021200 is a wasteful number, since it uses less digits than its factorization.

133100021200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453304 (or 1453293 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 133100021200 its reverse (2120001331), we get a palindrome (135220022531).

The spelling of 133100021200 in words is "one hundred thirty-three billion, one hundred million, twenty-one thousand, two hundred".