133421100 has 72 divisors (see below), whose sum is σ = 408755088. Its totient is φ = 33484800.

The previous prime is 133421081. The next prime is 133421111. The reversal of 133421100 is 1124331.

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 133421100.

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, 7981 + ... + 18180.

It is an arithmetic number, because the mean of its divisors is an integer number (5677154).

Almost surely, 2^133421100 is an apocalyptic number.

133421100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

133421100 is an abundant number, since it is smaller than the sum of its proper divisors (275333988).

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

133421100 is a wasteful number, since it uses less digits than its factorization.

133421100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26195 (or 26188 counting only the distinct ones).

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

The square root of 133421100 is about 11550.8051667405. The cubic root of 133421100 is about 510.9850243836.

Adding to 133421100 its reverse (1124331), we get a palindrome (134545431).

The spelling of 133421100 in words is "one hundred thirty-three million, four hundred twenty-one thousand, one hundred".