121313514522181 has 2 divisors, whose sum is σ = 121313514522182. Its totient is φ = 121313514522180.

The previous prime is 121313514522173. The next prime is 121313514522217. The reversal of 121313514522181 is 181225415313121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 93853294459681 + 27460220062500 = 9687791^2 + 5240250^2 .

It is an emirp because it is prime and its reverse (181225415313121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121313514522181 - 2³ = 121313514522173 is a prime.

It is a super-2 number, since 2×121313514522181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121313514522281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60656757261090 + 60656757261091.

It is an arithmetic number, because the mean of its divisors is an integer number (60656757261091).

Almost surely, 2^{121313514522181} is an apocalyptic number.

It is an amenable number.

121313514522181 is a deficient number, since it is larger than the sum of its proper divisors (1).

121313514522181 is an equidigital number, since it uses as much as digits as its factorization.

121313514522181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 40.

The spelling of 121313514522181 in words is "one hundred twenty-one trillion, three hundred thirteen billion, five hundred fourteen million, five hundred twenty-two thousand, one hundred eighty-one".