12122120220157 has 2 divisors, whose sum is σ = 12122120220158. Its totient is φ = 12122120220156.

The previous prime is 12122120220149. The next prime is 12122120220211. The reversal of 12122120220157 is 75102202122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10746634578436 + 1375485641721 = 3278206^2 + 1172811^2 .

It is an emirp because it is prime and its reverse (75102202122121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12122120220157 - 2³ = 12122120220149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12122120220127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061060110078 + 6061060110079.

It is an arithmetic number, because the mean of its divisors is an integer number (6061060110079).

Almost surely, 2^{12122120220157} is an apocalyptic number.

It is an amenable number.

12122120220157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122120220157 is an equidigital number, since it uses as much as digits as its factorization.

12122120220157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 28.

Adding to 12122120220157 its reverse (75102202122121), we get a palindrome (87224322342278).

The spelling of 12122120220157 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, two hundred twenty thousand, one hundred fifty-seven".