1175001221 has 2 divisors, whose sum is σ = 1175001222. Its totient is φ = 1175001220.

The previous prime is 1175001137. The next prime is 1175001227. The reversal of 1175001221 is 1221005711.

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., 777796321 + 397204900 = 27889^2 + 19930^2 .

It is a cyclic number.

It is not a de Polignac number, because 1175001221 - 2³⁰ = 101259397 is a prime.

1175001221 is a modest number, since divided by 1221 gives 1175 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1175001193 and 1175001202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1175001227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 587500610 + 587500611.

It is an arithmetic number, because the mean of its divisors is an integer number (587500611).

Almost surely, 2^1175001221 is an apocalyptic number.

It is an amenable number.

1175001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1175001221 is an equidigital number, since it uses as much as digits as its factorization.

1175001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 140, while the sum is 20.

The square root of 1175001221 is about 34278.2908121161. The cubic root of 1175001221 is about 1055.2275127577.

Adding to 1175001221 its reverse (1221005711), we get a palindrome (2396006932).

The spelling of 1175001221 in words is "one billion, one hundred seventy-five million, one thousand, two hundred twenty-one".