221134121 has 8 divisors (see below), whose sum is σ = 248498880. Its totient is φ = 195248592.

The previous prime is 221134063. The next prime is 221134153. The reversal of 221134121 is 121431122.

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

It is a cyclic number.

It is not a de Polignac number, because 221134121 - 2⁶ = 221134057 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 221134121.

It is not an unprimeable number, because it can be changed into a prime (221134321) 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, 369491 + ... + 370088.

It is an arithmetic number, because the mean of its divisors is an integer number (31062360).

Almost surely, 2^221134121 is an apocalyptic number.

It is an amenable number.

221134121 is a deficient number, since it is larger than the sum of its proper divisors (27364759).

221134121 is a wasteful number, since it uses less digits than its factorization.

221134121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739615.

The product of its digits is 96, while the sum is 17.

The square root of 221134121 is about 14870.5790405081. The cubic root of 221134121 is about 604.7166407503.

Adding to 221134121 its reverse (121431122), we get a palindrome (342565243).

The spelling of 221134121 in words is "two hundred twenty-one million, one hundred thirty-four thousand, one hundred twenty-one".