121033221 has 4 divisors (see below), whose sum is σ = 161377632. Its totient is φ = 80688812.

The previous prime is 121033201. The next prime is 121033243. The reversal of 121033221 is 122330121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121033221 - 2¹³ = 121025029 is a prime.

It is a super-3 number, since 3×121033221³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121033221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121033201) 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 3 ways as a sum of consecutive naturals, for example, 20172201 + ... + 20172206.

It is an arithmetic number, because the mean of its divisors is an integer number (40344408).

Almost surely, 2^121033221 is an apocalyptic number.

It is an amenable number.

121033221 is a deficient number, since it is larger than the sum of its proper divisors (40344411).

121033221 is an equidigital number, since it uses as much as digits as its factorization.

121033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40344410.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 121033221 is about 11001.5099418216. The cubic root of 121033221 is about 494.6540057396.

Adding to 121033221 its reverse (122330121), we get a palindrome (243363342).

The spelling of 121033221 in words is "one hundred twenty-one million, thirty-three thousand, two hundred twenty-one".