2122220111989 has 2 divisors, whose sum is σ = 2122220111990. Its totient is φ = 2122220111988.

The previous prime is 2122220111987. The next prime is 2122220112007. The reversal of 2122220111989 is 9891110222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2061478566225 + 60741545764 = 1435785^2 + 246458^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122220111989 - 2¹ = 2122220111987 is a prime.

It is a super-2 number, since 2×2122220111989² (a number of 25 digits) contains 22 as substring.

Together with 2122220111987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122220111983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061110055994 + 1061110055995.

It is an arithmetic number, because the mean of its divisors is an integer number (1061110055995).

Almost surely, 2^{2122220111989} is an apocalyptic number.

It is an amenable number.

2122220111989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122220111989 is an equidigital number, since it uses as much as digits as its factorization.

2122220111989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 40.

The spelling of 2122220111989 in words is "two trillion, one hundred twenty-two billion, two hundred twenty million, one hundred eleven thousand, nine hundred eighty-nine".