1331211031 has 2 divisors, whose sum is σ = 1331211032. Its totient is φ = 1331211030.

The previous prime is 1331211023. The next prime is 1331211073. The reversal of 1331211031 is 1301121331.

It is a weak prime.

It is an emirp because it is prime and its reverse (1301121331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331211031 - 2³ = 1331211023 is a prime.

It is a super-2 number, since 2×1331211031² = 3544245618112165922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331210996 and 1331211014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331212031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665605515 + 665605516.

It is an arithmetic number, because the mean of its divisors is an integer number (665605516).

Almost surely, 2^1331211031 is an apocalyptic number.

1331211031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331211031 is an equidigital number, since it uses as much as digits as its factorization.

1331211031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1331211031 is about 36485.7647720313. The cubic root of 1331211031 is about 1100.0581321895.

Adding to 1331211031 its reverse (1301121331), we get a palindrome (2632332362).

The spelling of 1331211031 in words is "one billion, three hundred thirty-one million, two hundred eleven thousand, thirty-one".