201212201101 has 4 divisors (see below), whose sum is σ = 206119815804. Its totient is φ = 196304586400.

The previous prime is 201212201023. The next prime is 201212201149. The reversal of 201212201101 is 101102212102.

201212201101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 58232929225 + 142979271876 = 241315^2 + 378126^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201212201101 is a prime.

It is a super-2 number, since 2×201212201101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201212261101) 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 in 3 ways as a sum of consecutive naturals, for example, 2453807290 + ... + 2453807371.

It is an arithmetic number, because the mean of its divisors is an integer number (51529953951).

Almost surely, 2^201212201101 is an apocalyptic number.

It is an amenable number.

201212201101 is a deficient number, since it is larger than the sum of its proper divisors (4907614703).

201212201101 is an equidigital number, since it uses as much as digits as its factorization.

201212201101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4907614702.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201212201101 its reverse (101102212102), we get a palindrome (302314413203).

It can be divided in two parts, 20121 and 2201101, that added together give a palindrome (2221222).

The spelling of 201212201101 in words is "two hundred one billion, two hundred twelve million, two hundred one thousand, one hundred one".