2121211289 has 2 divisors, whose sum is σ = 2121211290. Its totient is φ = 2121211288.

The previous prime is 2121211283. The next prime is 2121211327. The reversal of 2121211289 is 9821121212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1904886025 + 216325264 = 43645^2 + 14708^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121211289 - 2⁴ = 2121211273 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121211283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060605644 + 1060605645.

It is an arithmetic number, because the mean of its divisors is an integer number (1060605645).

Almost surely, 2^2121211289 is an apocalyptic number.

It is an amenable number.

2121211289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121211289 is an equidigital number, since it uses as much as digits as its factorization.

2121211289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 29.

The square root of 2121211289 is about 46056.6096125192. The cubic root of 2121211289 is about 1284.8762746829.

The spelling of 2121211289 in words is "two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eighty-nine".