1203320123311 has 4 divisors (see below), whose sum is σ = 1266652761400. Its totient is φ = 1139987485224.

The previous prime is 1203320123297. The next prime is 1203320123323. The reversal of 1203320123311 is 1133210233021.

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 1203320123311 - 2⁵ = 1203320123279 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 (1203320123371) 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, 31666319016 + ... + 31666319053.

It is an arithmetic number, because the mean of its divisors is an integer number (316663190350).

Almost surely, 2^{1203320123311} is an apocalyptic number.

1203320123311 is a deficient number, since it is larger than the sum of its proper divisors (63332638089).

1203320123311 is an equidigital number, since it uses as much as digits as its factorization.

1203320123311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63332638088.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1203320123311 its reverse (1133210233021), we get a palindrome (2336530356332).

The spelling of 1203320123311 in words is "one trillion, two hundred three billion, three hundred twenty million, one hundred twenty-three thousand, three hundred eleven".