121221133 has 8 divisors (see below), whose sum is σ = 135467136. Its totient is φ = 107512800.

The previous prime is 121221103. The next prime is 121221167. The reversal of 121221133 is 331122121.

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-121221133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133941 + ... + 134842.

It is an arithmetic number, because the mean of its divisors is an integer number (16933392).

Almost surely, 2^121221133 is an apocalyptic number.

It is an amenable number.

121221133 is a deficient number, since it is larger than the sum of its proper divisors (14246003).

121221133 is a wasteful number, since it uses less digits than its factorization.

121221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268835.

The product of its digits is 72, while the sum is 16.

The square root of 121221133 is about 11010.0469117983. The cubic root of 121221133 is about 494.9098676146.

Adding to 121221133 its reverse (331122121), we get a palindrome (452343254).

The spelling of 121221133 in words is "one hundred twenty-one million, two hundred twenty-one thousand, one hundred thirty-three".