303431434242121 has 4 divisors (see below), whose sum is σ = 303531345813892. Its totient is φ = 303331522670352.

The previous prime is 303431434242077. The next prime is 303431434242193. The reversal of 303431434242121 is 121242434134303.

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

It can be written as a sum of positive squares in 2 ways, for example, as 140912663800896 + 162518770441225 = 11870664^2 + 12748285^2 .

It is a cyclic number.

It is not a de Polignac number, because 303431434242121 - 2²⁵ = 303431400687689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (303431434212121) 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, 49955781330 + ... + 49955787403.

It is an arithmetic number, because the mean of its divisors is an integer number (75882836453473).

Almost surely, 2^{303431434242121} is an apocalyptic number.

It is an amenable number.

303431434242121 is a deficient number, since it is larger than the sum of its proper divisors (99911571771).

303431434242121 is an equidigital number, since it uses as much as digits as its factorization.

303431434242121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99911571770.

The product of its (nonzero) digits is 165888, while the sum is 37.

Adding to 303431434242121 its reverse (121242434134303), we get a palindrome (424673868376424).

The spelling of 303431434242121 in words is "three hundred three trillion, four hundred thirty-one billion, four hundred thirty-four million, two hundred forty-two thousand, one hundred twenty-one".