133021121 has 8 divisors (see below), whose sum is σ = 139285440. Its totient is φ = 126796912.

The previous prime is 133021099. The next prime is 133021153. The reversal of 133021121 is 121120331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133021121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 133021096 and 133021105.

It is not an unprimeable number, because it can be changed into a prime (133021171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3131 + ... + 16608.

It is an arithmetic number, because the mean of its divisors is an integer number (17410680).

Almost surely, 2^133021121 is an apocalyptic number.

It is an amenable number.

133021121 is a deficient number, since it is larger than the sum of its proper divisors (6264319).

133021121 is a wasteful number, since it uses less digits than its factorization.

133021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20055.

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

The square root of 133021121 is about 11533.4782698022. The cubic root of 133021121 is about 510.4738911920.

Adding to 133021121 its reverse (121120331), we get a palindrome (254141452).

The spelling of 133021121 in words is "one hundred thirty-three million, twenty-one thousand, one hundred twenty-one".