2121292889 has 2 divisors, whose sum is σ = 2121292890. Its totient is φ = 2121292888.

The previous prime is 2121292787. The next prime is 2121292913. The reversal of 2121292889 is 9882921212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1969584400 + 151708489 = 44380^2 + 12317^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121292889 - 2⁸ = 2121292633 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2121292189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060646444 + 1060646445.

It is an arithmetic number, because the mean of its divisors is an integer number (1060646445).

Almost surely, 2^2121292889 is an apocalyptic number.

It is an amenable number.

2121292889 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121292889 is an equidigital number, since it uses as much as digits as its factorization.

2121292889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 44.

The square root of 2121292889 is about 46057.4954703358. The cubic root of 2121292889 is about 1284.8927502630.

The spelling of 2121292889 in words is "two billion, one hundred twenty-one million, two hundred ninety-two thousand, eight hundred eighty-nine".