12122211989 has 2 divisors, whose sum is σ = 12122211990. Its totient is φ = 12122211988.

The previous prime is 12122211977. The next prime is 12122211991. The reversal of 12122211989 is 98911222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11955672964 + 166539025 = 109342^2 + 12905^2 .

It is an emirp because it is prime and its reverse (98911222121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12122211989 - 2¹² = 12122207893 is a prime.

It is a super-2 number, since 2×12122211989² (a number of 21 digits) contains 22 as substring.

Together with 12122211991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122211919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061105994 + 6061105995.

It is an arithmetic number, because the mean of its divisors is an integer number (6061105995).

Almost surely, 2^12122211989 is an apocalyptic number.

It is an amenable number.

12122211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122211989 is an equidigital number, since it uses as much as digits as its factorization.

12122211989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 38.

The spelling of 12122211989 in words is "twelve billion, one hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-nine".