121221023303 has 4 divisors (see below), whose sum is σ = 121230186000. Its totient is φ = 121211860608.

The previous prime is 121221023281. The next prime is 121221023311. The reversal of 121221023303 is 303320122121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121221023303 - 2⁸ = 121221023047 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 (121221023393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4561475 + ... + 4587972.

It is an arithmetic number, because the mean of its divisors is an integer number (30307546500).

Almost surely, 2^121221023303 is an apocalyptic number.

121221023303 is a deficient number, since it is larger than the sum of its proper divisors (9162697).

121221023303 is an equidigital number, since it uses as much as digits as its factorization.

121221023303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9162696.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 121221023303 its reverse (303320122121), we get a palindrome (424541145424).

The spelling of 121221023303 in words is "one hundred twenty-one billion, two hundred twenty-one million, twenty-three thousand, three hundred three".