121321310220263 has 2 divisors, whose sum is σ = 121321310220264. Its totient is φ = 121321310220262.

The previous prime is 121321310220197. The next prime is 121321310220301. The reversal of 121321310220263 is 362022013123121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121321310220263 is a prime.

It is a super-2 number, since 2×121321310220263² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121321310720263) 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 as a sum of consecutive naturals, namely, 60660655110131 + 60660655110132.

It is an arithmetic number, because the mean of its divisors is an integer number (60660655110132).

Almost surely, 2^{121321310220263} is an apocalyptic number.

121321310220263 is a deficient number, since it is larger than the sum of its proper divisors (1).

121321310220263 is an equidigital number, since it uses as much as digits as its factorization.

121321310220263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 121321310220263 its reverse (362022013123121), we get a palindrome (483343323343384).

The spelling of 121321310220263 in words is "one hundred twenty-one trillion, three hundred twenty-one billion, three hundred ten million, two hundred twenty thousand, two hundred sixty-three".