1163204221 has 2 divisors, whose sum is σ = 1163204222. Its totient is φ = 1163204220.

The previous prime is 1163204191. The next prime is 1163204233. The reversal of 1163204221 is 1224023611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1096536996 + 66667225 = 33114^2 + 8165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1163204221 - 2¹⁵ = 1163171453 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1163204192 and 1163204201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1163204521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 581602110 + 581602111.

It is an arithmetic number, because the mean of its divisors is an integer number (581602111).

Almost surely, 2^1163204221 is an apocalyptic number.

It is an amenable number.

1163204221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1163204221 is an equidigital number, since it uses as much as digits as its factorization.

1163204221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1163204221 is about 34105.7798767306. The cubic root of 1163204221 is about 1051.6841366070.

Adding to 1163204221 its reverse (1224023611), we get a palindrome (2387227832).

The spelling of 1163204221 in words is "one billion, one hundred sixty-three million, two hundred four thousand, two hundred twenty-one".