1311202110231 has 24 divisors (see below), whose sum is σ = 2040068206176. Its totient is φ = 806727263040.

The previous prime is 1311202110209. The next prime is 1311202110263. The reversal of 1311202110231 is 1320112021131.

It is not a de Polignac number, because 1311202110231 - 2¹⁵ = 1311202077463 is a prime.

It is a super-2 number, since 2×1311202110231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311202114231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 583995 + ... + 1721468.

It is an arithmetic number, because the mean of its divisors is an integer number (85002841924).

Almost surely, 2^{1311202110231} is an apocalyptic number.

1311202110231 is a deficient number, since it is larger than the sum of its proper divisors (728866095945).

1311202110231 is a wasteful number, since it uses less digits than its factorization.

1311202110231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310343 (or 2310340 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1311202110231 its reverse (1320112021131), we get a palindrome (2631314131362).

The spelling of 1311202110231 in words is "one trillion, three hundred eleven billion, two hundred two million, one hundred ten thousand, two hundred thirty-one".