12211212202111 has 8 divisors (see below), whose sum is σ = 13722298662240. Its totient is φ = 10781806091232.

The previous prime is 12211212202087. The next prime is 12211212202141. The reversal of 12211212202111 is 11120221211221.

It is a happy number.

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 12211212202111 - 2¹¹ = 12211212200063 is a prime.

It is a super-2 number, since 2×12211212202111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211212202141) 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, 20420086996 + ... + 20420087593.

It is an arithmetic number, because the mean of its divisors is an integer number (1715287332780).

Almost surely, 2^{12211212202111} is an apocalyptic number.

12211212202111 is a deficient number, since it is larger than the sum of its proper divisors (1511086460129).

12211212202111 is a wasteful number, since it uses less digits than its factorization.

12211212202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40840174625.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12211212202111 its reverse (11120221211221), we get a palindrome (23331433413332).

The spelling of 12211212202111 in words is "twelve trillion, two hundred eleven billion, two hundred twelve million, two hundred two thousand, one hundred eleven".