2120122220989 has 2 divisors, whose sum is σ = 2120122220990. Its totient is φ = 2120122220988.

The previous prime is 2120122220941. The next prime is 2120122221029. The reversal of 2120122220989 is 9890222210212.

It is an a-pointer prime, because the next prime (2120122221029) can be obtained adding 2120122220989 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296257392089 + 823864828900 = 1138533^2 + 907670^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120122220989 - 2³⁹ = 1570366407101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120122220789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060061110494 + 1060061110495.

It is an arithmetic number, because the mean of its divisors is an integer number (1060061110495).

Almost surely, 2^{2120122220989} is an apocalyptic number.

It is an amenable number.

2120122220989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120122220989 is an equidigital number, since it uses as much as digits as its factorization.

2120122220989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 40.

The spelling of 2120122220989 in words is "two trillion, one hundred twenty billion, one hundred twenty-two million, two hundred twenty thousand, nine hundred eighty-nine".