1211099993 has 2 divisors, whose sum is σ = 1211099994. Its totient is φ = 1211099992.

The previous prime is 1211099927. The next prime is 1211100013. The reversal of 1211099993 is 3999901121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1084582489 + 126517504 = 32933^2 + 11248^2 .

It is a cyclic number.

It is not a de Polignac number, because 1211099993 - 2²⁰ = 1210051417 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211093993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605549996 + 605549997.

It is an arithmetic number, because the mean of its divisors is an integer number (605549997).

Almost surely, 2^1211099993 is an apocalyptic number.

It is an amenable number.

1211099993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211099993 is an equidigital number, since it uses as much as digits as its factorization.

1211099993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39366, while the sum is 44.

The square root of 1211099993 is about 34800.8619577159. The cubic root of 1211099993 is about 1065.9250466796.

The spelling of 1211099993 in words is "one billion, two hundred eleven million, ninety-nine thousand, nine hundred ninety-three".