1211683201 has 2 divisors, whose sum is σ = 1211683202. Its totient is φ = 1211683200.

The previous prime is 1211683169. The next prime is 1211683223. The reversal of 1211683201 is 1023861121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1197090801 + 14592400 = 34599^2 + 3820^2 .

It is an emirp because it is prime and its reverse (1023861121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1211683201 - 2⁵ = 1211683169 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211683241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605841600 + 605841601.

It is an arithmetic number, because the mean of its divisors is an integer number (605841601).

Almost surely, 2^1211683201 is an apocalyptic number.

It is an amenable number.

1211683201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211683201 is an equidigital number, since it uses as much as digits as its factorization.

1211683201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 1211683201 is about 34809.2401669442. The cubic root of 1211683201 is about 1066.0961187789.

The spelling of 1211683201 in words is "one billion, two hundred eleven million, six hundred eighty-three thousand, two hundred one".