1321020202163 has 2 divisors, whose sum is σ = 1321020202164. Its totient is φ = 1321020202162.

The previous prime is 1321020202157. The next prime is 1321020202237. The reversal of 1321020202163 is 3612020201231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321020202163 - 2²⁴ = 1321003424947 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321020202063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660510101081 + 660510101082.

It is an arithmetic number, because the mean of its divisors is an integer number (660510101082).

Almost surely, 2^{1321020202163} is an apocalyptic number.

1321020202163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321020202163 is an equidigital number, since it uses as much as digits as its factorization.

1321020202163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 1321020202163 its reverse (3612020201231), we get a palindrome (4933040403394).

The spelling of 1321020202163 in words is "one trillion, three hundred twenty-one billion, twenty million, two hundred two thousand, one hundred sixty-three".