12221203454 has 4 divisors (see below), whose sum is σ = 18331805184. Its totient is φ = 6110601726.

The previous prime is 12221203411. The next prime is 12221203471. The reversal of 12221203454 is 45430212221.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 3055300862 + ... + 3055300865.

It is an arithmetic number, because the mean of its divisors is an integer number (4582951296).

Almost surely, 2^12221203454 is an apocalyptic number.

12221203454 is a deficient number, since it is larger than the sum of its proper divisors (6110601730).

12221203454 is an equidigital number, since it uses as much as digits as its factorization.

12221203454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110601729.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12221203454 its reverse (45430212221), we get a palindrome (57651415675).

The spelling of 12221203454 in words is "twelve billion, two hundred twenty-one million, two hundred three thousand, four hundred fifty-four".