1023112111291 has 2 divisors, whose sum is σ = 1023112111292. Its totient is φ = 1023112111290.

The previous prime is 1023112111213. The next prime is 1023112111319. The reversal of 1023112111291 is 1921112113201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1023112111291 - 2⁷ = 1023112111163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1023112211291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511556055645 + 511556055646.

It is an arithmetic number, because the mean of its divisors is an integer number (511556055646).

Almost surely, 2^{1023112111291} is an apocalyptic number.

1023112111291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023112111291 is an equidigital number, since it uses as much as digits as its factorization.

1023112111291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 25.

Adding to 1023112111291 its reverse (1921112113201), we get a palindrome (2944224224492).

The spelling of 1023112111291 in words is "one trillion, twenty-three billion, one hundred twelve million, one hundred eleven thousand, two hundred ninety-one".