21120201101 has 2 divisors, whose sum is σ = 21120201102. Its totient is φ = 21120201100.

The previous prime is 21120201097. The next prime is 21120201119. The reversal of 21120201101 is 10110202112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14603514025 + 6516687076 = 120845^2 + 80726^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120201101 - 2² = 21120201097 is a prime.

It is a super-2 number, since 2×21120201101² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21120201901) 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, 10560100550 + 10560100551.

It is an arithmetic number, because the mean of its divisors is an integer number (10560100551).

Almost surely, 2^21120201101 is an apocalyptic number.

It is an amenable number.

21120201101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120201101 is an equidigital number, since it uses as much as digits as its factorization.

21120201101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 21120201101 its reverse (10110202112), we get a palindrome (31230403213).

The spelling of 21120201101 in words is "twenty-one billion, one hundred twenty million, two hundred one thousand, one hundred one".