1311032212031 has 4 divisors (see below), whose sum is σ = 1323060030600. Its totient is φ = 1299004393464.

The previous prime is 1311032212027. The next prime is 1311032212037. The reversal of 1311032212031 is 1302122301131.

It is a happy number.

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 1311032212031 - 2² = 1311032212027 is a prime.

It is a super-2 number, since 2×1311032212031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311032211994 and 1311032212012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311032212037) 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, 6013909121 + ... + 6013909338.

It is an arithmetic number, because the mean of its divisors is an integer number (330765007650).

Almost surely, 2^{1311032212031} is an apocalyptic number.

1311032212031 is a deficient number, since it is larger than the sum of its proper divisors (12027818569).

1311032212031 is a wasteful number, since it uses less digits than its factorization.

1311032212031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12027818568.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1311032212031 its reverse (1302122301131), we get a palindrome (2613154513162).

The spelling of 1311032212031 in words is "one trillion, three hundred eleven billion, thirty-two million, two hundred twelve thousand, thirty-one".