122211989 has 2 divisors, whose sum is σ = 122211990. Its totient is φ = 122211988.

The previous prime is 122211983. The next prime is 122212007. The reversal of 122211989 is 989112221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121925764 + 286225 = 11042^2 + 535^2 .

It is an emirp because it is prime and its reverse (989112221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122211989 - 2¹² = 122207893 is a prime.

It is a super-2 number, since 2×122211989² = 29871540510672242, which contains 22 as substring.

It is a Chen prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122211983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61105994 + 61105995.

It is an arithmetic number, because the mean of its divisors is an integer number (61105995).

Almost surely, 2^122211989 is an apocalyptic number.

It is an amenable number.

122211989 is a deficient number, since it is larger than the sum of its proper divisors (1).

122211989 is an equidigital number, since it uses as much as digits as its factorization.

122211989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 35.

The square root of 122211989 is about 11054.9531432747. The cubic root of 122211989 is about 496.2546670119.

The spelling of 122211989 in words is "one hundred twenty-two million, two hundred eleven thousand, nine hundred eighty-nine".