12212201111121 has 48 divisors (see below), whose sum is σ = 19638801157248. Its totient is φ = 7250610931200.

The previous prime is 12212201111101. The next prime is 12212201111203. The reversal of 12212201111121 is 12111110221221.

It is a happy number.

12212201111121 is a `hidden beast` number, since 1 + 221 + 220 + 111 + 112 + 1 = 666.

It is not a de Polignac number, because 12212201111121 - 2¹⁵ = 12212201078353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212201111094 and 12212201111103.

It is not an unprimeable number, because it can be changed into a prime (12212201111101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4429576 + ... + 6636681.

It is an arithmetic number, because the mean of its divisors is an integer number (409141690776).

Almost surely, 2^{12212201111121} is an apocalyptic number.

12212201111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12212201111121 is a deficient number, since it is larger than the sum of its proper divisors (7426600046127).

12212201111121 is a wasteful number, since it uses less digits than its factorization.

12212201111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066502 (or 11066499 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12212201111121 its reverse (12111110221221), we get a palindrome (24323311332342).

The spelling of 12212201111121 in words is "twelve trillion, two hundred twelve billion, two hundred one million, one hundred eleven thousand, one hundred twenty-one".