2120219989 has 2 divisors, whose sum is σ = 2120219990. Its totient is φ = 2120219988.

The previous prime is 2120219987. The next prime is 2120220023. The reversal of 2120219989 is 9899120212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1365893764 + 754326225 = 36958^2 + 27465^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120219989 - 2¹ = 2120219987 is a prime.

Together with 2120219987, 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 (2120219987) 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 as a sum of consecutive naturals, namely, 1060109994 + 1060109995.

It is an arithmetic number, because the mean of its divisors is an integer number (1060109995).

Almost surely, 2^2120219989 is an apocalyptic number.

It is an amenable number.

2120219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120219989 is an equidigital number, since it uses as much as digits as its factorization.

2120219989 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2120219989 is about 46045.8465987976. The cubic root of 2120219989 is about 1284.6760908979.

The spelling of 2120219989 in words is "two billion, one hundred twenty million, two hundred nineteen thousand, nine hundred eighty-nine".