12211111102121 has 4 divisors (see below), whose sum is σ = 12211813836372. Its totient is φ = 12210408367872.

The previous prime is 12211111101997. The next prime is 12211111102147. The reversal of 12211111102121 is 12120111111221.

12211111102121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4254170254096 + 7956940848025 = 2062564^2 + 2820805^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211111102121 - 2¹⁴ = 12211111085737 is a prime.

It is a super-2 number, since 2×12211111102121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12211111102121.

It is not an unprimeable number, because it can be changed into a prime (12211111102181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351341060 + ... + 351375813.

It is an arithmetic number, because the mean of its divisors is an integer number (3052953459093).

Almost surely, 2^{12211111102121} is an apocalyptic number.

It is an amenable number.

12211111102121 is a deficient number, since it is larger than the sum of its proper divisors (702734251).

12211111102121 is an equidigital number, since it uses as much as digits as its factorization.

12211111102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702734250.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 12211111102121 its reverse (12120111111221), we get a palindrome (24331222213342).

It can be divided in two parts, 1221111 and 1102121, that added together give a palindrome (2323232).

The spelling of 12211111102121 in words is "twelve trillion, two hundred eleven billion, one hundred eleven million, one hundred two thousand, one hundred twenty-one".