12221001022121 has 32 divisors (see below), whose sum is σ = 13491324887040. Its totient is φ = 11031206953536.

The previous prime is 12221001022117. The next prime is 12221001022141. The reversal of 12221001022121 is 12122010012221.

It is not a de Polignac number, because 12221001022121 - 2² = 12221001022117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12221001022121.

It is not an unprimeable number, because it can be changed into a prime (12221001022141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22522610 + ... + 23058836.

It is an arithmetic number, because the mean of its divisors is an integer number (421603902720).

Almost surely, 2^{12221001022121} is an apocalyptic number.

It is an amenable number.

12221001022121 is a deficient number, since it is larger than the sum of its proper divisors (1270323864919).

12221001022121 is a wasteful number, since it uses less digits than its factorization.

12221001022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537053.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12221001022121 its reverse (12122010012221), we get a palindrome (24343011034342).

The spelling of 12221001022121 in words is "twelve trillion, two hundred twenty-one billion, one million, twenty-two thousand, one hundred twenty-one".