2121203017 has 2 divisors, whose sum is σ = 2121203018. Its totient is φ = 2121203016.

The previous prime is 2121202961. The next prime is 2121203059. The reversal of 2121203017 is 7103021212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1431562896 + 689640121 = 37836^2 + 26261^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121203017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121202985 and 2121203003.

It is not a weakly prime, because it can be changed into another prime (2121207017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060601508 + 1060601509.

It is an arithmetic number, because the mean of its divisors is an integer number (1060601509).

Almost surely, 2^2121203017 is an apocalyptic number.

It is an amenable number.

2121203017 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121203017 is an equidigital number, since it uses as much as digits as its factorization.

2121203017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 2121203017 is about 46056.5198099031. The cubic root of 2121203017 is about 1284.8746044877.

Adding to 2121203017 its reverse (7103021212), we get a palindrome (9224224229).

The spelling of 2121203017 in words is "two billion, one hundred twenty-one million, two hundred three thousand, seventeen".