12221202322157 has 2 divisors, whose sum is σ = 12221202322158. Its totient is φ = 12221202322156.

The previous prime is 12221202322073. The next prime is 12221202322159. The reversal of 12221202322157 is 75122320212221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12221079089956 + 123232201 = 3495866^2 + 11101^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221202322157 - 2¹⁸ = 12221202060013 is a prime.

Together with 12221202322159, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12221202322159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110601161078 + 6110601161079.

It is an arithmetic number, because the mean of its divisors is an integer number (6110601161079).

Almost surely, 2^{12221202322157} is an apocalyptic number.

It is an amenable number.

12221202322157 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221202322157 is an equidigital number, since it uses as much as digits as its factorization.

12221202322157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 12221202322157 its reverse (75122320212221), we get a palindrome (87343522534378).

The spelling of 12221202322157 in words is "twelve trillion, two hundred twenty-one billion, two hundred two million, three hundred twenty-two thousand, one hundred fifty-seven".