1303220221021 has 2 divisors, whose sum is σ = 1303220221022. Its totient is φ = 1303220221020.

The previous prime is 1303220220941. The next prime is 1303220221027. The reversal of 1303220221021 is 1201220223031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1303218595396 + 1625625 = 1141586^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303220221021 - 2⁹ = 1303220220509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1303220221021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1303220221027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 651610110510 + 651610110511.

It is an arithmetic number, because the mean of its divisors is an integer number (651610110511).

Almost surely, 2^{1303220221021} is an apocalyptic number.

It is an amenable number.

1303220221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1303220221021 is an equidigital number, since it uses as much as digits as its factorization.

1303220221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 1303220221021 its reverse (1201220223031), we get a palindrome (2504440444052).

The spelling of 1303220221021 in words is "one trillion, three hundred three billion, two hundred twenty million, two hundred twenty-one thousand, twenty-one".