1023112211291 has 2 divisors, whose sum is σ = 1023112211292. Its totient is φ = 1023112211290.

The previous prime is 1023112211279. The next prime is 1023112211321. The reversal of 1023112211291 is 1921122113201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1023112211291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1023112211291.

It is not a weakly prime, because it can be changed into another prime (1023112211221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511556105645 + 511556105646.

It is an arithmetic number, because the mean of its divisors is an integer number (511556105646).

Almost surely, 2^{1023112211291} is an apocalyptic number.

1023112211291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023112211291 is an equidigital number, since it uses as much as digits as its factorization.

1023112211291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

Adding to 1023112211291 its reverse (1921122113201), we get a palindrome (2944234324492).

The spelling of 1023112211291 in words is "one trillion, twenty-three billion, one hundred twelve million, two hundred eleven thousand, two hundred ninety-one".