1201110121 has 2 divisors, whose sum is σ = 1201110122. Its totient is φ = 1201110120.

The previous prime is 1201110103. The next prime is 1201110133. The reversal of 1201110121 is 1210111021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1101509721 + 99600400 = 33189^2 + 9980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1201110121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1201110098 and 1201110107.

It is not a weakly prime, because it can be changed into another prime (1201110101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600555060 + 600555061.

It is an arithmetic number, because the mean of its divisors is an integer number (600555061).

Almost surely, 2^1201110121 is an apocalyptic number.

It is an amenable number.

1201110121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201110121 is an equidigital number, since it uses as much as digits as its factorization.

1201110121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1201110121 is about 34657.0356637725. The cubic root of 1201110121 is about 1062.9861569621.

Adding to 1201110121 its reverse (1210111021), we get a palindrome (2411221142).

The spelling of 1201110121 in words is "one billion, two hundred one million, one hundred ten thousand, one hundred twenty-one".