121222220210501 has 2 divisors, whose sum is σ = 121222220210502. Its totient is φ = 121222220210500.

The previous prime is 121222220210387. The next prime is 121222220210503. The reversal of 121222220210501 is 105012022222121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111450037860100 + 9772182350401 = 10556990^2 + 3126049^2 .

It is a cyclic number.

It is not a de Polignac number, because 121222220210501 - 2⁴⁶ = 50853476032837 is a prime.

It is a Sophie Germain prime.

Together with 121222220210503, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121222220210503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611110105250 + 60611110105251.

It is an arithmetic number, because the mean of its divisors is an integer number (60611110105251).

Almost surely, 2^{121222220210501} is an apocalyptic number.

It is an amenable number.

121222220210501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222220210501 is an equidigital number, since it uses as much as digits as its factorization.

121222220210501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 121222220210501 its reverse (105012022222121), we get a palindrome (226234242432622).

The spelling of 121222220210501 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, two hundred ten thousand, five hundred one".