121221163 has 8 divisors (see below), whose sum is σ = 138728960. Its totient is φ = 103761000.

The previous prime is 121221103. The next prime is 121221167. The reversal of 121221163 is 361122121.

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

It is not a de Polignac number, because 121221163 - 2¹⁷ = 121090091 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 121221163.

It is not an unprimeable number, because it can be changed into a prime (121221167) 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, 6273 + ... + 16786.

It is an arithmetic number, because the mean of its divisors is an integer number (17341120).

Almost surely, 2^121221163 is an apocalyptic number.

121221163 is a deficient number, since it is larger than the sum of its proper divisors (17507797).

121221163 is an equidigital number, since it uses as much as digits as its factorization.

121221163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23817.

The product of its digits is 144, while the sum is 19.

The square root of 121221163 is about 11010.0482741903. The cubic root of 121221163 is about 494.9099084416.

Adding to 121221163 its reverse (361122121), we get a palindrome (482343284).

The spelling of 121221163 in words is "one hundred twenty-one million, two hundred twenty-one thousand, one hundred sixty-three".