2001111123247 has 2 divisors, whose sum is σ = 2001111123248. Its totient is φ = 2001111123246.

The previous prime is 2001111123173. The next prime is 2001111123259. The reversal of 2001111123247 is 7423211111002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2001111123247 - 2²⁷ = 2000976905519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001111523247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000555561623 + 1000555561624.

It is an arithmetic number, because the mean of its divisors is an integer number (1000555561624).

Almost surely, 2^{2001111123247} is an apocalyptic number.

2001111123247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001111123247 is an equidigital number, since it uses as much as digits as its factorization.

2001111123247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 25.

Adding to 2001111123247 its reverse (7423211111002), we get a palindrome (9424322234249).

The spelling of 2001111123247 in words is "two trillion, one billion, one hundred eleven million, one hundred twenty-three thousand, two hundred forty-seven".