121112020121 has 2 divisors, whose sum is σ = 121112020122. Its totient is φ = 121112020120.

The previous prime is 121112020087. The next prime is 121112020181. The reversal of 121112020121 is 121020211121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108975913225 + 12136106896 = 330115^2 + 110164^2 .

It is a cyclic number.

It is not a de Polignac number, because 121112020121 - 2¹⁰ = 121112019097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121112020096 and 121112020105.

It is not a weakly prime, because it can be changed into another prime (121112020181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60556010060 + 60556010061.

It is an arithmetic number, because the mean of its divisors is an integer number (60556010061).

Almost surely, 2^121112020121 is an apocalyptic number.

It is an amenable number.

121112020121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121112020121 is an equidigital number, since it uses as much as digits as its factorization.

121112020121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121112020121 its reverse (121020211121), we get a palindrome (242132231242).

The spelling of 121112020121 in words is "one hundred twenty-one billion, one hundred twelve million, twenty thousand, one hundred twenty-one".