12012111021121 has 8 divisors (see below), whose sum is σ = 12053181157920. Its totient is φ = 11971077971808.

The previous prime is 12012111021077. The next prime is 12012111021137. The reversal of 12012111021121 is 12112011121021.

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 12012111021121 - 2³⁵ = 11977751282753 is a prime.

It is a super-2 number, since 2×12012111021121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012111021095 and 12012111021104.

It is not an unprimeable number, because it can be changed into a prime (12012111021181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8622916 + ... + 9918613.

It is an arithmetic number, because the mean of its divisors is an integer number (1506647644740).

Almost surely, 2^{12012111021121} is an apocalyptic number.

It is an amenable number.

12012111021121 is a deficient number, since it is larger than the sum of its proper divisors (41070136799).

12012111021121 is a wasteful number, since it uses less digits than its factorization.

12012111021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18543743.

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

Adding to 12012111021121 its reverse (12112011121021), we get a palindrome (24124122142142).

The spelling of 12012111021121 in words is "twelve trillion, twelve billion, one hundred eleven million, twenty-one thousand, one hundred twenty-one".