1031123112091 has 2 divisors, whose sum is σ = 1031123112092. Its totient is φ = 1031123112090.

The previous prime is 1031123112083. The next prime is 1031123112113. The reversal of 1031123112091 is 1902113211301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1031123112091 - 2³ = 1031123112083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1031123113091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515561556045 + 515561556046.

It is an arithmetic number, because the mean of its divisors is an integer number (515561556046).

Almost surely, 2^{1031123112091} is an apocalyptic number.

1031123112091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031123112091 is an equidigital number, since it uses as much as digits as its factorization.

1031123112091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

Adding to 1031123112091 its reverse (1902113211301), we get a palindrome (2933236323392).

The spelling of 1031123112091 in words is "one trillion, thirty-one billion, one hundred twenty-three million, one hundred twelve thousand, ninety-one".