1213220717 has 8 divisors (see below), whose sum is σ = 1238160480. Its totient is φ = 1188426960.

The previous prime is 1213220707. The next prime is 1213220719. The reversal of 1213220717 is 7170223121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1213220717 - 2⁸ = 1213220461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213220719) 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 in 7 ways as a sum of consecutive naturals, for example, 19634 + ... + 53027.

It is an arithmetic number, because the mean of its divisors is an integer number (154770060).

Almost surely, 2^1213220717 is an apocalyptic number.

It is an amenable number.

1213220717 is a deficient number, since it is larger than the sum of its proper divisors (24939763).

1213220717 is an equidigital number, since it uses as much as digits as its factorization.

1213220717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73003.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 1213220717 is about 34831.3180485608. The cubic root of 1213220717 is about 1066.5468545875.

Adding to 1213220717 its reverse (7170223121), we get a palindrome (8383443838).

The spelling of 1213220717 in words is "one billion, two hundred thirteen million, two hundred twenty thousand, seven hundred seventeen".