12000012100221 has 16 divisors (see below), whose sum is σ = 16055051503680. Its totient is φ = 7972491838080.

The previous prime is 12000012100183. The next prime is 12000012100277. The reversal of 12000012100221 is 12200121000021.

It is not a de Polignac number, because 12000012100221 - 2⁹ = 12000012099709 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12000012100197 and 12000012100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000012100721) 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, 37188945 + ... + 37510233.

It is an arithmetic number, because the mean of its divisors is an integer number (1003440718980).

Almost surely, 2^{12000012100221} is an apocalyptic number.

It is an amenable number.

12000012100221 is a deficient number, since it is larger than the sum of its proper divisors (4055039403459).

12000012100221 is a wasteful number, since it uses less digits than its factorization.

12000012100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364076.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12000012100221 its reverse (12200121000021), we get a palindrome (24200133100242).

The spelling of 12000012100221 in words is "twelve trillion, twelve million, one hundred thousand, two hundred twenty-one".