121202112281 has 2 divisors, whose sum is σ = 121202112282. Its totient is φ = 121202112280.

The previous prime is 121202112223. The next prime is 121202112331. The reversal of 121202112281 is 182211202121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111862822681 + 9339289600 = 334459^2 + 96640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121202112281 is a prime.

It is a super-2 number, since 2×121202112281² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121202112881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60601056140 + 60601056141.

It is an arithmetic number, because the mean of its divisors is an integer number (60601056141).

Almost surely, 2^121202112281 is an apocalyptic number.

It is an amenable number.

121202112281 is a deficient number, since it is larger than the sum of its proper divisors (1).

121202112281 is an equidigital number, since it uses as much as digits as its factorization.

121202112281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

The spelling of 121202112281 in words is "one hundred twenty-one billion, two hundred two million, one hundred twelve thousand, two hundred eighty-one".