12217121703 has 24 divisors (see below), whose sum is σ = 18305960400. Its totient is φ = 8142337728.

The previous prime is 12217121699. The next prime is 12217121713. The reversal of 12217121703 is 30712171221.

It is not a de Polignac number, because 12217121703 - 2² = 12217121699 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12217121713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1256083 + ... + 1265771.

It is an arithmetic number, because the mean of its divisors is an integer number (762748350).

Almost surely, 2^12217121703 is an apocalyptic number.

12217121703 is a deficient number, since it is larger than the sum of its proper divisors (6088838697).

12217121703 is an frugal number, since it uses more digits than its factorization.

12217121703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14893 (or 14881 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

Adding to 12217121703 its reverse (30712171221), we get a palindrome (42929292924).

The spelling of 12217121703 in words is "twelve billion, two hundred seventeen million, one hundred twenty-one thousand, seven hundred three".