121713344221 has 4 divisors (see below), whose sum is σ = 139100964832. Its totient is φ = 104325723612.

The previous prime is 121713344173. The next prime is 121713344231. The reversal of 121713344221 is 122443317121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121713344221 - 2⁹ = 121713343709 is a prime.

It is a super-2 number, since 2×121713344221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121713344231) 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 3 ways as a sum of consecutive naturals, for example, 8693810295 + ... + 8693810308.

It is an arithmetic number, because the mean of its divisors is an integer number (34775241208).

Almost surely, 2^121713344221 is an apocalyptic number.

It is an amenable number.

121713344221 is a deficient number, since it is larger than the sum of its proper divisors (17387620611).

121713344221 is an equidigital number, since it uses as much as digits as its factorization.

121713344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17387620610.

The product of its digits is 8064, while the sum is 31.

The spelling of 121713344221 in words is "one hundred twenty-one billion, seven hundred thirteen million, three hundred forty-four thousand, two hundred twenty-one".