12002211122121 has 48 divisors (see below), whose sum is σ = 19104298244928. Its totient is φ = 7200434313600.

The previous prime is 12002211122107. The next prime is 12002211122147. The reversal of 12002211122121 is 12122111220021.

12002211122121 is a `hidden beast` number, since 1 + 200 + 221 + 1 + 1 + 221 + 21 = 666.

It is not a de Polignac number, because 12002211122121 - 2¹¹ = 12002211120073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12002211122094 and 12002211122103.

It is not an unprimeable number, because it can be changed into a prime (12002211122101) 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, 13083631 + ... + 13970891.

It is an arithmetic number, because the mean of its divisors is an integer number (398006213436).

Almost surely, 2^{12002211122121} is an apocalyptic number.

12002211122121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12002211122121 is a deficient number, since it is larger than the sum of its proper divisors (7102087122807).

12002211122121 is a wasteful number, since it uses less digits than its factorization.

12002211122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888662 (or 888659 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12002211122121 its reverse (12122111220021), we get a palindrome (24124322342142).

The spelling of 12002211122121 in words is "twelve trillion, two billion, two hundred eleven million, one hundred twenty-two thousand, one hundred twenty-one".