1303003122221 has 4 divisors (see below), whose sum is σ = 1321355278944. Its totient is φ = 1284650965500.

The previous prime is 1303003122139. The next prime is 1303003122233. The reversal of 1303003122221 is 1222213003031.

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 1303003122221 - 2¹⁸ = 1303002860077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303003122193 and 1303003122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303003124221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9176078255 + ... + 9176078396.

It is an arithmetic number, because the mean of its divisors is an integer number (330338819736).

Almost surely, 2^{1303003122221} is an apocalyptic number.

It is an amenable number.

1303003122221 is a deficient number, since it is larger than the sum of its proper divisors (18352156723).

1303003122221 is an equidigital number, since it uses as much as digits as its factorization.

1303003122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18352156722.

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

Adding to 1303003122221 its reverse (1222213003031), we get a palindrome (2525216125252).

The spelling of 1303003122221 in words is "one trillion, three hundred three billion, three million, one hundred twenty-two thousand, two hundred twenty-one".