1031212313 has 2 divisors, whose sum is σ = 1031212314. Its totient is φ = 1031212312.

The previous prime is 1031212297. The next prime is 1031212319. The reversal of 1031212313 is 3132121301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 833303689 + 197908624 = 28867^2 + 14068^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031212313 - 2⁴ = 1031212297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031212291 and 1031212300.

It is not a weakly prime, because it can be changed into another prime (1031212319) 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, 515606156 + 515606157.

It is an arithmetic number, because the mean of its divisors is an integer number (515606157).

Almost surely, 2^1031212313 is an apocalyptic number.

It is an amenable number.

1031212313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031212313 is an equidigital number, since it uses as much as digits as its factorization.

1031212313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1031212313 is about 32112.4946555075. The cubic root of 1031212313 is about 1010.2976977561.

Adding to 1031212313 its reverse (3132121301), we get a palindrome (4163333614).

The spelling of 1031212313 in words is "one billion, thirty-one million, two hundred twelve thousand, three hundred thirteen".