121212430081 has 2 divisors, whose sum is σ = 121212430082. Its totient is φ = 121212430080.

The previous prime is 121212430033. The next prime is 121212430103. The reversal of 121212430081 is 180034212121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100930113025 + 20282317056 = 317695^2 + 142416^2 .

It is an emirp because it is prime and its reverse (180034212121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121212430081 is a prime.

It is a super-2 number, since 2×121212430081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121212430481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606215040 + 60606215041.

It is an arithmetic number, because the mean of its divisors is an integer number (60606215041).

Almost surely, 2^121212430081 is an apocalyptic number.

It is an amenable number.

121212430081 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212430081 is an equidigital number, since it uses as much as digits as its factorization.

121212430081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 25.

The spelling of 121212430081 in words is "one hundred twenty-one billion, two hundred twelve million, four hundred thirty thousand, eighty-one".