1213224871 has 2 divisors, whose sum is σ = 1213224872. Its totient is φ = 1213224870.

The previous prime is 1213224829. The next prime is 1213224923. The reversal of 1213224871 is 1784223121.

It is a weak prime.

It is an emirp because it is prime and its reverse (1784223121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213224871 - 2⁹ = 1213224359 is a prime.

It is a super-2 number, since 2×1213224871² = 2943829175225933282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213254871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606612435 + 606612436.

It is an arithmetic number, because the mean of its divisors is an integer number (606612436).

Almost surely, 2^1213224871 is an apocalyptic number.

1213224871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213224871 is an equidigital number, since it uses as much as digits as its factorization.

1213224871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 31.

The square root of 1213224871 is about 34831.3776787540. The cubic root of 1213224871 is about 1066.5480718517.

Adding to 1213224871 its reverse (1784223121), we get a palindrome (2997447992).

The spelling of 1213224871 in words is "one billion, two hundred thirteen million, two hundred twenty-four thousand, eight hundred seventy-one".