122151075581 has 2 divisors, whose sum is σ = 122151075582. Its totient is φ = 122151075580.

The previous prime is 122151075569. The next prime is 122151075643. The reversal of 122151075581 is 185570151221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74117340025 + 48033735556 = 272245^2 + 219166^2 .

It is a cyclic number.

It is not a de Polignac number, because 122151075581 - 2⁶ = 122151075517 is a prime.

It is a super-3 number, since 3×122151075581³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122151075481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61075537790 + 61075537791.

It is an arithmetic number, because the mean of its divisors is an integer number (61075537791).

Almost surely, 2^122151075581 is an apocalyptic number.

It is an amenable number.

122151075581 is a deficient number, since it is larger than the sum of its proper divisors (1).

122151075581 is an equidigital number, since it uses as much as digits as its factorization.

122151075581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28000, while the sum is 38.

The spelling of 122151075581 in words is "one hundred twenty-two billion, one hundred fifty-one million, seventy-five thousand, five hundred eighty-one".