122808643381 has 2 divisors, whose sum is σ = 122808643382. Its totient is φ = 122808643380.

The previous prime is 122808643361. The next prime is 122808643393. The reversal of 122808643381 is 183346808221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69878279025 + 52930364356 = 264345^2 + 230066^2 .

It is an emirp because it is prime and its reverse (183346808221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122808643381 - 2¹³ = 122808635189 is a prime.

It is a super-2 number, since 2×122808643381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122808643301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61404321690 + 61404321691.

It is an arithmetic number, because the mean of its divisors is an integer number (61404321691).

Almost surely, 2^122808643381 is an apocalyptic number.

It is an amenable number.

122808643381 is a deficient number, since it is larger than the sum of its proper divisors (1).

122808643381 is an equidigital number, since it uses as much as digits as its factorization.

122808643381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 442368, while the sum is 46.

The spelling of 122808643381 in words is "one hundred twenty-two billion, eight hundred eight million, six hundred forty-three thousand, three hundred eighty-one".