1216217023 has 24 divisors (see below), whose sum is σ = 1480677408. Its totient is φ = 978174912.

The previous prime is 1216217021. The next prime is 1216217027. The reversal of 1216217023 is 3207126121.

It is a happy number.

It is not a de Polignac number, because 1216217023 - 2¹ = 1216217021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216217021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193161 + ... + 199357.

It is an arithmetic number, because the mean of its divisors is an integer number (61694892).

Almost surely, 2^1216217023 is an apocalyptic number.

1216217023 is a deficient number, since it is larger than the sum of its proper divisors (264460385).

1216217023 is an equidigital number, since it uses as much as digits as its factorization.

1216217023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6303 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1216217023 is about 34874.3031901714. The cubic root of 1216217023 is about 1067.4241540154.

The spelling of 1216217023 in words is "one billion, two hundred sixteen million, two hundred seventeen thousand, twenty-three".