1031211113 has 2 divisors, whose sum is σ = 1031211114. Its totient is φ = 1031211112.

The previous prime is 1031211091. The next prime is 1031211133. The reversal of 1031211113 is 3111121301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536015104 + 495196009 = 23152^2 + 22253^2 .

It is an emirp because it is prime and its reverse (3111121301) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1031211113 - 2⁸ = 1031210857 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031211133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515605556 + 515605557.

It is an arithmetic number, because the mean of its divisors is an integer number (515605557).

Almost surely, 2^1031211113 is an apocalyptic number.

It is an amenable number.

1031211113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031211113 is an equidigital number, since it uses as much as digits as its factorization.

1031211113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1031211113 is about 32112.4759711860. The cubic root of 1031211113 is about 1010.2973058686.

Adding to 1031211113 its reverse (3111121301), we get a palindrome (4142332414).

The spelling of 1031211113 in words is "one billion, thirty-one million, two hundred eleven thousand, one hundred thirteen".