1213211297 has 2 divisors, whose sum is σ = 1213211298. Its totient is φ = 1213211296.

The previous prime is 1213211267. The next prime is 1213211323. The reversal of 1213211297 is 7921123121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 635241616 + 577969681 = 25204^2 + 24041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213211297 - 2¹² = 1213207201 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213211267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606605648 + 606605649.

It is an arithmetic number, because the mean of its divisors is an integer number (606605649).

Almost surely, 2^1213211297 is an apocalyptic number.

It is an amenable number.

1213211297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213211297 is an equidigital number, since it uses as much as digits as its factorization.

1213211297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 1213211297 is about 34831.1828251640. The cubic root of 1213211297 is about 1066.5440941946.

The spelling of 1213211297 in words is "one billion, two hundred thirteen million, two hundred eleven thousand, two hundred ninety-seven".