1212209956567 has 2 divisors, whose sum is σ = 1212209956568. Its totient is φ = 1212209956566.

The previous prime is 1212209956549. The next prime is 1212209956571. The reversal of 1212209956567 is 7656599022121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212209956567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212209956577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606104978283 + 606104978284.

It is an arithmetic number, because the mean of its divisors is an integer number (606104978284).

Almost surely, 2^{1212209956567} is an apocalyptic number.

1212209956567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212209956567 is an equidigital number, since it uses as much as digits as its factorization.

1212209956567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 1212209956567 in words is "one trillion, two hundred twelve billion, two hundred nine million, nine hundred fifty-six thousand, five hundred sixty-seven".