12101220001 has 16 divisors (see below), whose sum is σ = 13307175504. Its totient is φ = 10936802304.

The previous prime is 12101219927. The next prime is 12101220029. The reversal of 12101220001 is 10002210121.

12101220001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1139130001 + 10962090000 = 33751^2 + 104700^2 .

It is a cyclic number.

It is not a de Polignac number, because 12101220001 - 2²⁵ = 12067665569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12101220001.

It is not an unprimeable number, because it can be changed into a prime (12101220091) 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 15 ways as a sum of consecutive naturals, for example, 83475 + ... + 176551.

It is an arithmetic number, because the mean of its divisors is an integer number (831698469).

Almost surely, 2^12101220001 is an apocalyptic number.

It is an amenable number.

12101220001 is a deficient number, since it is larger than the sum of its proper divisors (1205955503).

12101220001 is a wasteful number, since it uses less digits than its factorization.

12101220001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93300.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 12101220001 its reverse (10002210121), we get a palindrome (22103430122).

The spelling of 12101220001 in words is "twelve billion, one hundred one million, two hundred twenty thousand, one".