12211012021121 has 8 divisors (see below), whose sum is σ = 12681481421664. Its totient is φ = 11749019546880.

The previous prime is 12211012021079. The next prime is 12211012021127. The reversal of 12211012021121 is 12112021011221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12211012021121 - 2⁶ = 12211012021057 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 12211012021121.

It is not an unprimeable number, because it can be changed into a prime (12211012021127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2119228640 + ... + 2119234401.

It is an arithmetic number, because the mean of its divisors is an integer number (1585185177708).

Almost surely, 2^{12211012021121} is an apocalyptic number.

It is an amenable number.

12211012021121 is a deficient number, since it is larger than the sum of its proper divisors (470469400543).

12211012021121 is an equidigital number, since it uses as much as digits as its factorization.

12211012021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238463151.

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

Adding to 12211012021121 its reverse (12112021011221), we get a palindrome (24323033032342).

The spelling of 12211012021121 in words is "twelve trillion, two hundred eleven billion, twelve million, twenty-one thousand, one hundred twenty-one".