1321030211999 has 4 divisors (see below), whose sum is σ = 1366582977960. Its totient is φ = 1275477446040.

The previous prime is 1321030211987. The next prime is 1321030212013. The reversal of 1321030211999 is 9991120301231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321030211999 - 2²⁰ = 1321029163423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321030211299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22776382937 + ... + 22776382994.

It is an arithmetic number, because the mean of its divisors is an integer number (341645744490).

Almost surely, 2^{1321030211999} is an apocalyptic number.

1321030211999 is a deficient number, since it is larger than the sum of its proper divisors (45552765961).

1321030211999 is an equidigital number, since it uses as much as digits as its factorization.

1321030211999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45552765960.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 1321030211999 in words is "one trillion, three hundred twenty-one billion, thirty million, two hundred eleven thousand, nine hundred ninety-nine".