303112202220021 has 4 divisors (see below), whose sum is σ = 404149602960032. Its totient is φ = 202074801480012.

The previous prime is 303112202220017. The next prime is 303112202220077. The reversal of 303112202220021 is 120022202211303.

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 not a de Polignac number, because 303112202220021 - 2² = 303112202220017 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 303112202220021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303112202220011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50518700370001 + ... + 50518700370006.

It is an arithmetic number, because the mean of its divisors is an integer number (101037400740008).

Almost surely, 2^{303112202220021} is an apocalyptic number.

It is an amenable number.

303112202220021 is a deficient number, since it is larger than the sum of its proper divisors (101037400740011).

303112202220021 is a wasteful number, since it uses less digits than its factorization.

303112202220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101037400740010.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 303112202220021 its reverse (120022202211303), we get a palindrome (423134404431324).

The spelling of 303112202220021 in words is "three hundred three trillion, one hundred twelve billion, two hundred two million, two hundred twenty thousand, twenty-one".