121212202289 has 2 divisors, whose sum is σ = 121212202290. Its totient is φ = 121212202288.

The previous prime is 121212202211. The next prime is 121212202409. The reversal of 121212202289 is 982202212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110030197264 + 11182005025 = 331708^2 + 105745^2 .

It is a cyclic number.

It is not a de Polignac number, because 121212202289 - 2¹⁶ = 121212136753 is a prime.

It is not a weakly prime, because it can be changed into another prime (121212201289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606101144 + 60606101145.

It is an arithmetic number, because the mean of its divisors is an integer number (60606101145).

Almost surely, 2^121212202289 is an apocalyptic number.

It is an amenable number.

121212202289 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212202289 is an equidigital number, since it uses as much as digits as its factorization.

121212202289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 121212202289 in words is "one hundred twenty-one billion, two hundred twelve million, two hundred two thousand, two hundred eighty-nine".