2112017817797 has 2 divisors, whose sum is σ = 2112017817798. Its totient is φ = 2112017817796.

The previous prime is 2112017817761. The next prime is 2112017817809. The reversal of 2112017817797 is 7977187102112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1082267783041 + 1029750034756 = 1040321^2 + 1014766^2 .

It is a cyclic number.

It is not a de Polignac number, because 2112017817797 - 2¹⁶ = 2112017752261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2112017817097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056008908898 + 1056008908899.

It is an arithmetic number, because the mean of its divisors is an integer number (1056008908899).

Almost surely, 2^{2112017817797} is an apocalyptic number.

It is an amenable number.

2112017817797 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112017817797 is an equidigital number, since it uses as much as digits as its factorization.

2112017817797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691488, while the sum is 53.

The spelling of 2112017817797 in words is "two trillion, one hundred twelve billion, seventeen million, eight hundred seventeen thousand, seven hundred ninety-seven".