200120111110121 has 2 divisors, whose sum is σ = 200120111110122. Its totient is φ = 200120111110120.

The previous prime is 200120111110109. The next prime is 200120111110123. The reversal of 200120111110121 is 121011111021002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197861808464896 + 2258302645225 = 14066336^2 + 1502765^2 .

It is a cyclic number.

It is not a de Polignac number, because 200120111110121 - 2³⁸ = 199845233203177 is a prime.

Together with 200120111110123, 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 = 200120111110096 and 200120111110105.

It is not a weakly prime, because it can be changed into another prime (200120111110123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100060055555060 + 100060055555061.

It is an arithmetic number, because the mean of its divisors is an integer number (100060055555061).

Almost surely, 2^{200120111110121} is an apocalyptic number.

It is an amenable number.

200120111110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

200120111110121 is an equidigital number, since it uses as much as digits as its factorization.

200120111110121 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 200120111110121 its reverse (121011111021002), we get a palindrome (321131222131123).

The spelling of 200120111110121 in words is "two hundred trillion, one hundred twenty billion, one hundred eleven million, one hundred ten thousand, one hundred twenty-one".