2123100989 has 2 divisors, whose sum is σ = 2123100990. Its totient is φ = 2123100988.

The previous prime is 2123100961. The next prime is 2123101007. The reversal of 2123100989 is 9890013212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2122905625 + 195364 = 46075^2 + 442^2 .

It is a cyclic number.

It is not a de Polignac number, because 2123100989 - 2¹² = 2123096893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2123100949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061550494 + 1061550495.

It is an arithmetic number, because the mean of its divisors is an integer number (1061550495).

Almost surely, 2^2123100989 is an apocalyptic number.

It is an amenable number.

2123100989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2123100989 is an equidigital number, since it uses as much as digits as its factorization.

2123100989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 2123100989 is about 46077.1200163378. The cubic root of 2123100989 is about 1285.2577092677.

The spelling of 2123100989 in words is "two billion, one hundred twenty-three million, one hundred thousand, nine hundred eighty-nine".