122531543513 has 2 divisors, whose sum is σ = 122531543514. Its totient is φ = 122531543512.

The previous prime is 122531543489. The next prime is 122531543521. The reversal of 122531543513 is 315345135221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99658913344 + 22872630169 = 315688^2 + 151237^2 .

It is an emirp because it is prime and its reverse (315345135221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122531543513 - 2¹⁶ = 122531477977 is a prime.

It is not a weakly prime, because it can be changed into another prime (122531543713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61265771756 + 61265771757.

It is an arithmetic number, because the mean of its divisors is an integer number (61265771757).

Almost surely, 2^122531543513 is an apocalyptic number.

It is an amenable number.

122531543513 is a deficient number, since it is larger than the sum of its proper divisors (1).

122531543513 is an equidigital number, since it uses as much as digits as its factorization.

122531543513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 35.

Adding to 122531543513 its reverse (315345135221), we get a palindrome (437876678734).

The spelling of 122531543513 in words is "one hundred twenty-two billion, five hundred thirty-one million, five hundred forty-three thousand, five hundred thirteen".