1221047297 has 2 divisors, whose sum is σ = 1221047298. Its totient is φ = 1221047296.

The previous prime is 1221047273. The next prime is 1221047327. The reversal of 1221047297 is 7927401221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 859134721 + 361912576 = 29311^2 + 19024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1221047297 - 2⁸ = 1221047041 is a prime.

It is a super-2 number, since 2×1221047297² = 2981913003022012418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1221047227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610523648 + 610523649.

It is an arithmetic number, because the mean of its divisors is an integer number (610523649).

Almost surely, 2^1221047297 is an apocalyptic number.

It is an amenable number.

1221047297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1221047297 is an equidigital number, since it uses as much as digits as its factorization.

1221047297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 1221047297 is about 34943.4871900330. The cubic root of 1221047297 is about 1068.8353989783.

The spelling of 1221047297 in words is "one billion, two hundred twenty-one million, forty-seven thousand, two hundred ninety-seven".