2121210212089 has 2 divisors, whose sum is σ = 2121210212090. Its totient is φ = 2121210212088.

The previous prime is 2121210212039. The next prime is 2121210212129. The reversal of 2121210212089 is 9802120121212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1299866773689 + 821343438400 = 1140117^2 + 906280^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121210212089 - 2¹³ = 2121210203897 is a prime.

It is a super-3 number, since 3×2121210212089³ (a number of 38 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2121210212089.

It is not a weakly prime, because it can be changed into another prime (2121210212039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060605106044 + 1060605106045.

It is an arithmetic number, because the mean of its divisors is an integer number (1060605106045).

Almost surely, 2^{2121210212089} is an apocalyptic number.

It is an amenable number.

2121210212089 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121210212089 is an equidigital number, since it uses as much as digits as its factorization.

2121210212089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 2121210212089 in words is "two trillion, one hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, eighty-nine".