123235221077 has 2 divisors, whose sum is σ = 123235221078. Its totient is φ = 123235221076.

The previous prime is 123235221007. The next prime is 123235221079. The reversal of 123235221077 is 770122532321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122888106916 + 347114161 = 350554^2 + 18631^2 .

It is a cyclic number.

It is not a de Polignac number, because 123235221077 - 2²⁶ = 123168112213 is a prime.

Together with 123235221079, 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 (123235221079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61617610538 + 61617610539.

It is an arithmetic number, because the mean of its divisors is an integer number (61617610539).

Almost surely, 2^123235221077 is an apocalyptic number.

It is an amenable number.

123235221077 is a deficient number, since it is larger than the sum of its proper divisors (1).

123235221077 is an equidigital number, since it uses as much as digits as its factorization.

123235221077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 35.

Adding to 123235221077 its reverse (770122532321), we get a palindrome (893357753398).

The spelling of 123235221077 in words is "one hundred twenty-three billion, two hundred thirty-five million, two hundred twenty-one thousand, seventy-seven".