1031223231191 has 2 divisors, whose sum is σ = 1031223231192. Its totient is φ = 1031223231190.

The previous prime is 1031223231149. The next prime is 1031223231251. The reversal of 1031223231191 is 1911323221301.

1031223231191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031223231191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031223231991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515611615595 + 515611615596.

It is an arithmetic number, because the mean of its divisors is an integer number (515611615596).

Almost surely, 2^{1031223231191} is an apocalyptic number.

1031223231191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031223231191 is an equidigital number, since it uses as much as digits as its factorization.

1031223231191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

Adding to 1031223231191 its reverse (1911323221301), we get a palindrome (2942546452492).

The spelling of 1031223231191 in words is "one trillion, thirty-one billion, two hundred twenty-three million, two hundred thirty-one thousand, one hundred ninety-one".