121311113201281 has 2 divisors, whose sum is σ = 121311113201282. Its totient is φ = 121311113201280.

The previous prime is 121311113201237. The next prime is 121311113201347. The reversal of 121311113201281 is 182102311113121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120923364138256 + 387749063025 = 10996516^2 + 622695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121311113201281 is a prime.

It is a super-2 number, since 2×121311113201281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121311113201231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60655556600640 + 60655556600641.

It is an arithmetic number, because the mean of its divisors is an integer number (60655556600641).

Almost surely, 2^{121311113201281} is an apocalyptic number.

It is an amenable number.

121311113201281 is a deficient number, since it is larger than the sum of its proper divisors (1).

121311113201281 is an equidigital number, since it uses as much as digits as its factorization.

121311113201281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 121311113201281 in words is "one hundred twenty-one trillion, three hundred eleven billion, one hundred thirteen million, two hundred one thousand, two hundred eighty-one".