12212889021 has 16 divisors (see below), whose sum is σ = 18399835200. Its totient is φ = 8003926224.

The previous prime is 12212889019. The next prime is 12212889043. The reversal of 12212889021 is 12098821221.

It is not a de Polignac number, because 12212889021 - 2¹ = 12212889019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212889001) 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 15 ways as a sum of consecutive naturals, for example, 3831706 + ... + 3834891.

It is an arithmetic number, because the mean of its divisors is an integer number (1149989700).

Almost surely, 2^12212889021 is an apocalyptic number.

It is an amenable number.

12212889021 is a deficient number, since it is larger than the sum of its proper divisors (6186946179).

12212889021 is an equidigital number, since it uses as much as digits as its factorization.

12212889021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7666665 (or 7666659 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The spelling of 12212889021 in words is "twelve billion, two hundred twelve million, eight hundred eighty-nine thousand, twenty-one".