121110012010121 has 2 divisors, whose sum is σ = 121110012010122. Its totient is φ = 121110012010120.

The previous prime is 121110012010109. The next prime is 121110012010123. The reversal of 121110012010121 is 121010210011121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75147035850121 + 45962976160000 = 8668739^2 + 6779600^2 .

It is a cyclic number.

It is not a de Polignac number, because 121110012010121 - 2²² = 121110007815817 is a prime.

It is a super-3 number, since 3×121110012010121³ (a number of 43 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 121110012010123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121110012010096 and 121110012010105.

It is not a weakly prime, because it can be changed into another prime (121110012010123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60555006005060 + 60555006005061.

It is an arithmetic number, because the mean of its divisors is an integer number (60555006005061).

Almost surely, 2^{121110012010121} is an apocalyptic number.

It is an amenable number.

121110012010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121110012010121 is an equidigital number, since it uses as much as digits as its factorization.

121110012010121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 121110012010121 its reverse (121010210011121), we get a palindrome (242120222021242).

The spelling of 121110012010121 in words is "one hundred twenty-one trillion, one hundred ten billion, twelve million, ten thousand, one hundred twenty-one".