123221113421 has 16 divisors (see below), whose sum is σ = 148252713600. Its totient is φ = 100047918528.

The previous prime is 123221113417. The next prime is 123221113423. The reversal of 123221113421 is 124311122321.

It is a cyclic number.

It is not a de Polignac number, because 123221113421 - 2² = 123221113417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123221113423) 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 15 ways as a sum of consecutive naturals, for example, 1246895 + ... + 1342083.

It is an arithmetic number, because the mean of its divisors is an integer number (9265794600).

Almost surely, 2^123221113421 is an apocalyptic number.

It is an amenable number.

123221113421 is a deficient number, since it is larger than the sum of its proper divisors (25031600179).

123221113421 is an equidigital number, since it uses as much as digits as its factorization.

123221113421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104948.

The product of its digits is 576, while the sum is 23.

Adding to 123221113421 its reverse (124311122321), we get a palindrome (247532235742).

The spelling of 123221113421 in words is "one hundred twenty-three billion, two hundred twenty-one million, one hundred thirteen thousand, four hundred twenty-one".