2011209997 has 2 divisors, whose sum is σ = 2011209998. Its totient is φ = 2011209996.

The previous prime is 2011209989. The next prime is 2011210009. The reversal of 2011209997 is 7999021102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1768286601 + 242923396 = 42051^2 + 15586^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011209997 - 2³ = 2011209989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2011209397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005604998 + 1005604999.

It is an arithmetic number, because the mean of its divisors is an integer number (1005604999).

Almost surely, 2^2011209997 is an apocalyptic number.

It is an amenable number.

2011209997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011209997 is an equidigital number, since it uses as much as digits as its factorization.

2011209997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 40.

The square root of 2011209997 is about 44846.5159962287. The cubic root of 2011209997 is about 1262.2706174381.

The spelling of 2011209997 in words is "two billion, eleven million, two hundred nine thousand, nine hundred ninety-seven".