12121111021201 has 16 divisors (see below), whose sum is σ = 14919682153600. Its totient is φ = 9589434956928.

The previous prime is 12121111021193. The next prime is 12121111021213. The reversal of 12121111021201 is 10212011112121.

It is a cyclic number.

It is not a de Polignac number, because 12121111021201 - 2³ = 12121111021193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12121111021231) 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, 5231091 + ... + 7183768.

It is an arithmetic number, because the mean of its divisors is an integer number (932480134600).

Almost surely, 2^{12121111021201} is an apocalyptic number.

It is an amenable number.

12121111021201 is a deficient number, since it is larger than the sum of its proper divisors (2798571132399).

12121111021201 is a wasteful number, since it uses less digits than its factorization.

12121111021201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12425608.

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

Adding to 12121111021201 its reverse (10212011112121), we get a palindrome (22333122133322).

The spelling of 12121111021201 in words is "twelve trillion, one hundred twenty-one billion, one hundred eleven million, twenty-one thousand, two hundred one".