1217952011 has 2 divisors, whose sum is σ = 1217952012. Its totient is φ = 1217952010.

The previous prime is 1217951989. The next prime is 1217952053. The reversal of 1217952011 is 1102597121.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1102597121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1217952011 - 2²⁶ = 1150843147 is a prime.

It is not a weakly prime, because it can be changed into another prime (1217952061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608976005 + 608976006.

It is an arithmetic number, because the mean of its divisors is an integer number (608976006).

Almost surely, 2^1217952011 is an apocalyptic number.

1217952011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217952011 is an equidigital number, since it uses as much as digits as its factorization.

1217952011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 29.

The square root of 1217952011 is about 34899.1692021458. The cubic root of 1217952011 is about 1067.9314889515.

The spelling of 1217952011 in words is "one billion, two hundred seventeen million, nine hundred fifty-two thousand, eleven".