2117001281 has 2 divisors, whose sum is σ = 2117001282. Its totient is φ = 2117001280.

The previous prime is 2117001269. The next prime is 2117001301. The reversal of 2117001281 is 1821007112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1677721600 + 439279681 = 40960^2 + 20959^2 .

It is a cyclic number.

It is not a de Polignac number, because 2117001281 - 2¹⁰ = 2117000257 is a prime.

It is a super-2 number, since 2×2117001281² = 8963388847511281922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2117001251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058500640 + 1058500641.

It is an arithmetic number, because the mean of its divisors is an integer number (1058500641).

Almost surely, 2^2117001281 is an apocalyptic number.

It is an amenable number.

2117001281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117001281 is an equidigital number, since it uses as much as digits as its factorization.

2117001281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

The square root of 2117001281 is about 46010.8822019313. The cubic root of 2117001281 is about 1284.0256723176.

Adding to 2117001281 its reverse (1821007112), we get a palindrome (3938008393).

The spelling of 2117001281 in words is "two billion, one hundred seventeen million, one thousand, two hundred eighty-one".