12221102222121 has 64 divisors (see below), whose sum is σ = 18396772595712. Its totient is φ = 7160098125312.

The previous prime is 12221102222117. The next prime is 12221102222123. The reversal of 12221102222121 is 12122220112221.

It is not a de Polignac number, because 12221102222121 - 2² = 12221102222117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12221102222123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1236573246 + ... + 1236583128.

It is an arithmetic number, because the mean of its divisors is an integer number (287449571808).

Almost surely, 2^{12221102222121} is an apocalyptic number.

It is an amenable number.

12221102222121 is a deficient number, since it is larger than the sum of its proper divisors (6175670373591).

12221102222121 is a wasteful number, since it uses less digits than its factorization.

12221102222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16222.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 12221102222121 its reverse (12122220112221), we get a palindrome (24343322334342).

The spelling of 12221102222121 in words is "twelve trillion, two hundred twenty-one billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty-one".