120111022121 has 2 divisors, whose sum is σ = 120111022122. Its totient is φ = 120111022120.

The previous prime is 120111022103. The next prime is 120111022123. The reversal of 120111022121 is 121220111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80962442521 + 39148579600 = 284539^2 + 197860^2 .

It is an emirp because it is prime and its reverse (121220111021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120111022121 - 2¹⁴ = 120111005737 is a prime.

Together with 120111022123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120111022096 and 120111022105.

It is not a weakly prime, because it can be changed into another prime (120111022123) 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, 60055511060 + 60055511061.

It is an arithmetic number, because the mean of its divisors is an integer number (60055511061).

Almost surely, 2^120111022121 is an apocalyptic number.

It is an amenable number.

120111022121 is a deficient number, since it is larger than the sum of its proper divisors (1).

120111022121 is an equidigital number, since it uses as much as digits as its factorization.

120111022121 is an odious number, because the sum of its binary digits is odd.

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

Adding to 120111022121 its reverse (121220111021), we get a palindrome (241331133142).

The spelling of 120111022121 in words is "one hundred twenty billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".