12101001012221 has 16 divisors (see below), whose sum is σ = 13578958955520. Its totient is φ = 10689388693680.

The previous prime is 12101001012197. The next prime is 12101001012241. The reversal of 12101001012221 is 12221010010121.

It is a cyclic number.

It is not a de Polignac number, because 12101001012221 - 2⁶ = 12101001012157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101001012196 and 12101001012205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101001012241) 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, 84123071 + ... + 84266796.

It is an arithmetic number, because the mean of its divisors is an integer number (848684934720).

Almost surely, 2^{12101001012221} is an apocalyptic number.

12101001012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12101001012221 is a deficient number, since it is larger than the sum of its proper divisors (1477957943299).

12101001012221 is a wasteful number, since it uses less digits than its factorization.

12101001012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168390064.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12101001012221 its reverse (12221010010121), we get a palindrome (24322011022342).

The spelling of 12101001012221 in words is "twelve trillion, one hundred one billion, one million, twelve thousand, two hundred twenty-one".