133120121 has 16 divisors (see below), whose sum is σ = 142179840. Its totient is φ = 124420800.

The previous prime is 133120103. The next prime is 133120133. The reversal of 133120121 is 121021331.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133120121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133120096 and 133120105.

It is not an unprimeable number, because it can be changed into a prime (133120321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137180 + ... + 138146.

It is an arithmetic number, because the mean of its divisors is an integer number (8886240).

Almost surely, 2^133120121 is an apocalyptic number.

It is an amenable number.

133120121 is a deficient number, since it is larger than the sum of its proper divisors (9059719).

133120121 is a wasteful number, since it uses less digits than its factorization.

133120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1144.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 133120121 is about 11537.7693251339. The cubic root of 133120121 is about 510.6004986129.

Adding to 133120121 its reverse (121021331), we get a palindrome (254141452).

The spelling of 133120121 in words is "one hundred thirty-three million, one hundred twenty thousand, one hundred twenty-one".