12211220211121 has 8 divisors (see below), whose sum is σ = 12605241420800. Its totient is φ = 11817205931520.

The previous prime is 12211220211109. The next prime is 12211220211173. The reversal of 12211220211121 is 12111202211221.

It is a happy number.

12211220211121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 12211220211121 - 2¹⁷ = 12211220080049 is a prime.

It is a super-2 number, since 2×12211220211121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211220211221) 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, 1974385 + ... + 5321713.

It is an arithmetic number, because the mean of its divisors is an integer number (1575655177600).

Almost surely, 2^{12211220211121} is an apocalyptic number.

It is an amenable number.

12211220211121 is a deficient number, since it is larger than the sum of its proper divisors (394021209679).

12211220211121 is a wasteful number, since it uses less digits than its factorization.

12211220211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3465039.

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

Adding to 12211220211121 its reverse (12111202211221), we get a palindrome (24322422422342).

The spelling of 12211220211121 in words is "twelve trillion, two hundred eleven billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-one".