133132121 has 4 divisors (see below), whose sum is σ = 133201572. Its totient is φ = 133062672.

The previous prime is 133132093. The next prime is 133132133. The reversal of 133132121 is 121231331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121231331 = 13 ⋅9325487.

It can be written as a sum of positive squares in 2 ways, for example, as 60217600 + 72914521 = 7760^2 + 8539^2 .

It is a cyclic number.

It is not a de Polignac number, because 133132121 - 2⁶ = 133132057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133132121.

It is not an unprimeable number, because it can be changed into a prime (133132141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31766 + ... + 35711.

It is an arithmetic number, because the mean of its divisors is an integer number (33300393).

Almost surely, 2^133132121 is an apocalyptic number.

It is an amenable number.

133132121 is a deficient number, since it is larger than the sum of its proper divisors (69451).

133132121 is an equidigital number, since it uses as much as digits as its factorization.

133132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69450.

The product of its digits is 108, while the sum is 17.

The square root of 133132121 is about 11538.2893446126. The cubic root of 133132121 is about 510.6158407010.

Adding to 133132121 its reverse (121231331), we get a palindrome (254363452).

The spelling of 133132121 in words is "one hundred thirty-three million, one hundred thirty-two thousand, one hundred twenty-one".