12100100012221 has 16 divisors (see below), whose sum is σ = 13047395257008. Its totient is φ = 11155173120000.

The previous prime is 12100100012177. The next prime is 12100100012239. The reversal of 12100100012221 is 12221000100121.

It can be written as a sum of positive squares in 8 ways, for example, as 9778243225 + 12090321768996 = 98885^2 + 3477114^2 .

It is not a de Polignac number, because 12100100012221 - 2³¹ = 12097952528573 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100100012281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33936171 + ... + 34290871.

It is an arithmetic number, because the mean of its divisors is an integer number (815462203563).

Almost surely, 2^{12100100012221} is an apocalyptic number.

It is an amenable number.

12100100012221 is a deficient number, since it is larger than the sum of its proper divisors (947295244787).

12100100012221 is a wasteful number, since it uses less digits than its factorization.

12100100012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358032.

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

Adding to 12100100012221 its reverse (12221000100121), we get a palindrome (24321100112342).

The spelling of 12100100012221 in words is "twelve trillion, one hundred billion, one hundred million, twelve thousand, two hundred twenty-one".