12111221220201 has 24 divisors (see below), whose sum is σ = 17620606471104. Its totient is φ = 8015859355680.

The previous prime is 12111221220193. The next prime is 12111221220209. The reversal of 12111221220201 is 10202212211121.

12111221220201 is a `hidden beast` number, since 1 + 21 + 1 + 1 + 221 + 220 + 201 = 666.

12111221220201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12111221220193) and next prime (12111221220209).

It is not a de Polignac number, because 12111221220201 - 2³ = 12111221220193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111221220209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5376621 + ... + 7289066.

It is an arithmetic number, because the mean of its divisors is an integer number (734191936296).

Almost surely, 2^{12111221220201} is an apocalyptic number.

It is an amenable number.

12111221220201 is a deficient number, since it is larger than the sum of its proper divisors (5509385250903).

12111221220201 is a wasteful number, since it uses less digits than its factorization.

12111221220201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12666461 (or 12666458 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12111221220201 its reverse (10202212211121), we get a palindrome (22313433431322).

The spelling of 12111221220201 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-one million, two hundred twenty thousand, two hundred one".