12211220000121 has 16 divisors (see below), whose sum is σ = 16434392128704. Its totient is φ = 8064436165184.

The previous prime is 12211220000117. The next prime is 12211220000131. The reversal of 12211220000121 is 12100002211221.

It is a cyclic number.

It is not a de Polignac number, because 12211220000121 - 2² = 12211220000117 is a prime.

It is a super-2 number, since 2×12211220000121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12211220000121.

It is not an unprimeable number, because it can be changed into a prime (12211220000131) 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, 8280031 + ... + 9642683.

It is an arithmetic number, because the mean of its divisors is an integer number (1027149508044).

Almost surely, 2^{12211220000121} is an apocalyptic number.

It is an amenable number.

12211220000121 is a deficient number, since it is larger than the sum of its proper divisors (4223172128583).

12211220000121 is a wasteful number, since it uses less digits than its factorization.

12211220000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390680.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12211220000121 its reverse (12100002211221), we get a palindrome (24311222211342).

The spelling of 12211220000121 in words is "twelve trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty-one", and thus it is an aban number.