12213063921 has 4 divisors (see below), whose sum is σ = 16284085232. Its totient is φ = 8142042612.

The previous prime is 12213063901. The next prime is 12213063923. The reversal of 12213063921 is 12936031221.

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 not a de Polignac number, because 12213063921 - 2²¹ = 12210966769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12213063923) 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 3 ways as a sum of consecutive naturals, for example, 2035510651 + ... + 2035510656.

It is an arithmetic number, because the mean of its divisors is an integer number (4071021308).

Almost surely, 2^12213063921 is an apocalyptic number.

It is an amenable number.

12213063921 is a deficient number, since it is larger than the sum of its proper divisors (4071021311).

12213063921 is an equidigital number, since it uses as much as digits as its factorization.

12213063921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071021310.

The product of its (nonzero) digits is 3888, while the sum is 30.

The spelling of 12213063921 in words is "twelve billion, two hundred thirteen million, sixty-three thousand, nine hundred twenty-one".