1213102361 has 2 divisors, whose sum is σ = 1213102362. Its totient is φ = 1213102360.

The previous prime is 1213102339. The next prime is 1213102399. The reversal of 1213102361 is 1632013121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1212362761 + 739600 = 34819^2 + 860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213102361 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1213102321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606551180 + 606551181.

It is an arithmetic number, because the mean of its divisors is an integer number (606551181).

Almost surely, 2^1213102361 is an apocalyptic number.

It is an amenable number.

1213102361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213102361 is an equidigital number, since it uses as much as digits as its factorization.

1213102361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1213102361 is about 34829.6190188753. The cubic root of 1213102361 is about 1066.5121710593.

Adding to 1213102361 its reverse (1632013121), we get a palindrome (2845115482).

The spelling of 1213102361 in words is "one billion, two hundred thirteen million, one hundred two thousand, three hundred sixty-one".