1303220110021 has 2 divisors, whose sum is σ = 1303220110022. Its totient is φ = 1303220110020.

The previous prime is 1303220110013. The next prime is 1303220110067. The reversal of 1303220110021 is 1200110223031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 673039752100 + 630180357921 = 820390^2 + 793839^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303220110021 - 2³ = 1303220110013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1303220109977 and 1303220110004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303220110001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651610055010 + 651610055011.

It is an arithmetic number, because the mean of its divisors is an integer number (651610055011).

Almost surely, 2^{1303220110021} is an apocalyptic number.

It is an amenable number.

1303220110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303220110021 is an equidigital number, since it uses as much as digits as its factorization.

1303220110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1303220110021 its reverse (1200110223031), we get a palindrome (2503330333052).

The spelling of 1303220110021 in words is "one trillion, three hundred three billion, two hundred twenty million, one hundred ten thousand, twenty-one".