2011123310191 has 2 divisors, whose sum is σ = 2011123310192. Its totient is φ = 2011123310190.

The previous prime is 2011123310107. The next prime is 2011123310267. The reversal of 2011123310191 is 1910133211102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2011123310191 - 2²³ = 2011114921583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011123310101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005561655095 + 1005561655096.

It is an arithmetic number, because the mean of its divisors is an integer number (1005561655096).

Almost surely, 2^{2011123310191} is an apocalyptic number.

2011123310191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011123310191 is an equidigital number, since it uses as much as digits as its factorization.

2011123310191 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 2011123310191 its reverse (1910133211102), we get a palindrome (3921256521293).

The spelling of 2011123310191 in words is "two trillion, eleven billion, one hundred twenty-three million, three hundred ten thousand, one hundred ninety-one".