1223250426137 has 2 divisors, whose sum is σ = 1223250426138. Its totient is φ = 1223250426136.

The previous prime is 1223250426109. The next prime is 1223250426161. The reversal of 1223250426137 is 7316240523221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 661873365136 + 561377061001 = 813556^2 + 749251^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223250426137 - 2²² = 1223246231833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1223250426137.

It is not a weakly prime, because it can be changed into another prime (1223250426737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611625213068 + 611625213069.

It is an arithmetic number, because the mean of its divisors is an integer number (611625213069).

Almost surely, 2^{1223250426137} is an apocalyptic number.

It is an amenable number.

1223250426137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223250426137 is an equidigital number, since it uses as much as digits as its factorization.

1223250426137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 1223250426137 its reverse (7316240523221), we get a palindrome (8539490949358).

The spelling of 1223250426137 in words is "one trillion, two hundred twenty-three billion, two hundred fifty million, four hundred twenty-six thousand, one hundred thirty-seven".