1230320021311 has 4 divisors (see below), whose sum is σ = 1230894670824. Its totient is φ = 1229745371800.

The previous prime is 1230320021267. The next prime is 1230320021323. The reversal of 1230320021311 is 1131200230321.

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 1230320021311 - 2⁹ = 1230320020799 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 (1230320021011) 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, 287321545 + ... + 287325826.

It is an arithmetic number, because the mean of its divisors is an integer number (307723667706).

Almost surely, 2^{1230320021311} is an apocalyptic number.

1230320021311 is a deficient number, since it is larger than the sum of its proper divisors (574649513).

1230320021311 is an equidigital number, since it uses as much as digits as its factorization.

1230320021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574649512.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1230320021311 its reverse (1131200230321), we get a palindrome (2361520251632).

The spelling of 1230320021311 in words is "one trillion, two hundred thirty billion, three hundred twenty million, twenty-one thousand, three hundred eleven".