2121866093 has 2 divisors, whose sum is σ = 2121866094. Its totient is φ = 2121866092.

The previous prime is 2121866069. The next prime is 2121866099. The reversal of 2121866093 is 3906681212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1310584804 + 811281289 = 36202^2 + 28483^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121866093 - 2¹² = 2121861997 is a prime.

It is a super-3 number, since 3×2121866093³ (a number of 29 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121866099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060933046 + 1060933047.

It is an arithmetic number, because the mean of its divisors is an integer number (1060933047).

Almost surely, 2^2121866093 is an apocalyptic number.

It is an amenable number.

2121866093 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121866093 is an equidigital number, since it uses as much as digits as its factorization.

2121866093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2121866093 is about 46063.7177505247. The cubic root of 2121866093 is about 1285.0084720381.

The spelling of 2121866093 in words is "two billion, one hundred twenty-one million, eight hundred sixty-six thousand, ninety-three".