1311212310231 has 16 divisors (see below), whose sum is σ = 1769135896800. Its totient is φ = 863775928320.

The previous prime is 1311212310227. The next prime is 1311212310277. The reversal of 1311212310231 is 1320132121131.

It is not a de Polignac number, because 1311212310231 - 2² = 1311212310227 is a prime.

It is a super-2 number, since 2×1311212310231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311212310198 and 1311212310207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311212310281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7513110 + ... + 7685651.

It is an arithmetic number, because the mean of its divisors is an integer number (110570993550).

Almost surely, 2^{1311212310231} is an apocalyptic number.

1311212310231 is a deficient number, since it is larger than the sum of its proper divisors (457923586569).

1311212310231 is a wasteful number, since it uses less digits than its factorization.

1311212310231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15199106.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1311212310231 its reverse (1320132121131), we get a palindrome (2631344431362).

The spelling of 1311212310231 in words is "one trillion, three hundred eleven billion, two hundred twelve million, three hundred ten thousand, two hundred thirty-one".