12212009989 has 2 divisors, whose sum is σ = 12212009990. Its totient is φ = 12212009988.

The previous prime is 12212009981. The next prime is 12212010007. The reversal of 12212009989 is 98990021221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11673073764 + 538936225 = 108042^2 + 23215^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212009989 - 2³ = 12212009981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212009981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106004994 + 6106004995.

It is an arithmetic number, because the mean of its divisors is an integer number (6106004995).

Almost surely, 2^12212009989 is an apocalyptic number.

It is an amenable number.

12212009989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212009989 is an equidigital number, since it uses as much as digits as its factorization.

12212009989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 43.

The spelling of 12212009989 in words is "twelve billion, two hundred twelve million, nine thousand, nine hundred eighty-nine".