21120112201 has 2 divisors, whose sum is σ = 21120112202. Its totient is φ = 21120112200.

The previous prime is 21120112147. The next prime is 21120112217. The reversal of 21120112201 is 10221102112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15208808976 + 5911303225 = 123324^2 + 76885^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120112201 - 2⁹ = 21120111689 is a prime.

It is not a weakly prime, because it can be changed into another prime (21120112241) 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, 10560056100 + 10560056101.

It is an arithmetic number, because the mean of its divisors is an integer number (10560056101).

Almost surely, 2^21120112201 is an apocalyptic number.

It is an amenable number.

21120112201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120112201 is an equidigital number, since it uses as much as digits as its factorization.

21120112201 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 13.

Adding to 21120112201 its reverse (10221102112), we get a palindrome (31341214313).

The spelling of 21120112201 in words is "twenty-one billion, one hundred twenty million, one hundred twelve thousand, two hundred one".