1321203230099 has 2 divisors, whose sum is σ = 1321203230100. Its totient is φ = 1321203230098.

The previous prime is 1321203230089. The next prime is 1321203230111. The reversal of 1321203230099 is 9900323021231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321203230099 - 2⁴⁰ = 221691602323 is a prime.

It is a super-2 number, since 2×1321203230099² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321203230069) 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, 660601615049 + 660601615050.

It is an arithmetic number, because the mean of its divisors is an integer number (660601615050).

Almost surely, 2^{1321203230099} is an apocalyptic number.

1321203230099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321203230099 is an equidigital number, since it uses as much as digits as its factorization.

1321203230099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 1321203230099 in words is "one trillion, three hundred twenty-one billion, two hundred three million, two hundred thirty thousand, ninety-nine".