121221433303 has 4 divisors (see below), whose sum is σ = 127601508760. Its totient is φ = 114841357848.

The previous prime is 121221433297. The next prime is 121221433309. The reversal of 121221433303 is 303334122121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303334122121 = 1543 ⋅196587247.

It is an interprime number because it is at equal distance from previous prime (121221433297) and next prime (121221433309).

It is not a de Polignac number, because 121221433303 - 2¹³ = 121221425111 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 (121221433309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3190037700 + ... + 3190037737.

It is an arithmetic number, because the mean of its divisors is an integer number (31900377190).

Almost surely, 2^121221433303 is an apocalyptic number.

121221433303 is a deficient number, since it is larger than the sum of its proper divisors (6380075457).

121221433303 is an equidigital number, since it uses as much as digits as its factorization.

121221433303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6380075456.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 121221433303 its reverse (303334122121), we get a palindrome (424555555424).

The spelling of 121221433303 in words is "one hundred twenty-one billion, two hundred twenty-one million, four hundred thirty-three thousand, three hundred three".