1213204061 has 2 divisors, whose sum is σ = 1213204062. Its totient is φ = 1213204060.

The previous prime is 1213204049. The next prime is 1213204141. The reversal of 1213204061 is 1604023121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771783961 + 441420100 = 27781^2 + 21010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213204061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213204361) 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, 606602030 + 606602031.

It is an arithmetic number, because the mean of its divisors is an integer number (606602031).

Almost surely, 2^1213204061 is an apocalyptic number.

It is an amenable number.

1213204061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213204061 is an equidigital number, since it uses as much as digits as its factorization.

1213204061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1213204061 is about 34831.0789525676. The cubic root of 1213204061 is about 1066.5419737812.

Adding to 1213204061 its reverse (1604023121), we get a palindrome (2817227182).

The spelling of 1213204061 in words is "one billion, two hundred thirteen million, two hundred four thousand, sixty-one".