133134221 has 12 divisors (see below), whose sum is σ = 148420320. Its totient is φ = 118434360.

The previous prime is 133134217. The next prime is 133134263. The reversal of 133134221 is 122431331.

It is not a de Polignac number, because 133134221 - 2² = 133134217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133134193 and 133134202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133134821) 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, 21560 + ... + 27038.

It is an arithmetic number, because the mean of its divisors is an integer number (12368360).

Almost surely, 2^133134221 is an apocalyptic number.

133134221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133134221 is a deficient number, since it is larger than the sum of its proper divisors (15286099).

133134221 is an equidigital number, since it uses as much as digits as its factorization.

133134221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5584 (or 5537 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 133134221 is about 11538.3803456118. The cubic root of 133134221 is about 510.6185254716.

Adding to 133134221 its reverse (122431331), we get a palindrome (255565552).

The spelling of 133134221 in words is "one hundred thirty-three million, one hundred thirty-four thousand, two hundred twenty-one".