1217212471 has 2 divisors, whose sum is σ = 1217212472. Its totient is φ = 1217212470.

The previous prime is 1217212459. The next prime is 1217212519. The reversal of 1217212471 is 1742127121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1217212471 - 2¹⁵ = 1217179703 is a prime.

It is a super-3 number, since 3×1217212471³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1217212411) 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, 608606235 + 608606236.

It is an arithmetic number, because the mean of its divisors is an integer number (608606236).

Almost surely, 2^1217212471 is an apocalyptic number.

1217212471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1217212471 is an equidigital number, since it uses as much as digits as its factorization.

1217212471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 28.

The square root of 1217212471 is about 34888.5722121155. The cubic root of 1217212471 is about 1067.7152959896.

Adding to 1217212471 its reverse (1742127121), we get a palindrome (2959339592).

The spelling of 1217212471 in words is "one billion, two hundred seventeen million, two hundred twelve thousand, four hundred seventy-one".