12101220101 has 4 divisors (see below), whose sum is σ = 12113358732. Its totient is φ = 12089081472.

The previous prime is 12101220091. The next prime is 12101220119. The reversal of 12101220101 is 10102210121.

12101220101 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, and also an emirpimes, since its reverse is a distinct semiprime: 10102210121 = 23 ⋅439226527.

It can be written as a sum of positive squares in 2 ways, for example, as 10251360001 + 1849860100 = 101249^2 + 43010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101220101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101220301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6067820 + ... + 6069813.

It is an arithmetic number, because the mean of its divisors is an integer number (3028339683).

Almost surely, 2^12101220101 is an apocalyptic number.

It is an amenable number.

12101220101 is a deficient number, since it is larger than the sum of its proper divisors (12138631).

12101220101 is an equidigital number, since it uses as much as digits as its factorization.

12101220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138630.

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

Adding to 12101220101 its reverse (10102210121), we get a palindrome (22203430222).

The spelling of 12101220101 in words is "twelve billion, one hundred one million, two hundred twenty thousand, one hundred one".