12101201212121 has 16 divisors (see below), whose sum is σ = 13836024244224. Its totient is φ = 10367898891264.

The previous prime is 12101201212073. The next prime is 12101201212147. The reversal of 12101201212121 is 12121210210121.

It is a cyclic number.

It is not a de Polignac number, because 12101201212121 - 2³⁰ = 12100127470297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12101201212121.

It is not an unprimeable number, because it can be changed into a prime (12101201212181) 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, 286784801 + ... + 286826993.

It is an arithmetic number, because the mean of its divisors is an integer number (864751515264).

Almost surely, 2^{12101201212121} is an apocalyptic number.

It is an amenable number.

12101201212121 is a deficient number, since it is larger than the sum of its proper divisors (1734823032103).

12101201212121 is a wasteful number, since it uses less digits than its factorization.

12101201212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59240.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12101201212121 its reverse (12121210210121), we get a palindrome (24222411422242).

The spelling of 12101201212121 in words is "twelve trillion, one hundred one billion, two hundred one million, two hundred twelve thousand, one hundred twenty-one".