122121507289 has 2 divisors, whose sum is σ = 122121507290. Its totient is φ = 122121507288.

The previous prime is 122121507281. The next prime is 122121507317. The reversal of 122121507289 is 982705121221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103116127689 + 19005379600 = 321117^2 + 137860^2 .

It is an emirp because it is prime and its reverse (982705121221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122121507289 - 2³ = 122121507281 is a prime.

It is not a weakly prime, because it can be changed into another prime (122121507281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61060753644 + 61060753645.

It is an arithmetic number, because the mean of its divisors is an integer number (61060753645).

Almost surely, 2^122121507289 is an apocalyptic number.

It is an amenable number.

122121507289 is a deficient number, since it is larger than the sum of its proper divisors (1).

122121507289 is an equidigital number, since it uses as much as digits as its factorization.

122121507289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 122121507289 in words is "one hundred twenty-two billion, one hundred twenty-one million, five hundred seven thousand, two hundred eighty-nine".