12012111121021 has 8 divisors (see below), whose sum is σ = 13351368793824. Its totient is φ = 10714061376720.

The previous prime is 12012111120983. The next prime is 12012111121033.

12012111121021 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012111121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012111120986 and 12012111121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012111121051) 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, 10301981511 + ... + 10301982676.

It is an arithmetic number, because the mean of its divisors is an integer number (1668921099228).

Almost surely, 2^{12012111121021} is an apocalyptic number.

12012111121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012111121021 is a deficient number, since it is larger than the sum of its proper divisors (1339257672803).

12012111121021 is a wasteful number, since it uses less digits than its factorization.

12012111121021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20603964251.

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

It can be divided in two parts, 1201211 and 1121021, that added together give a palindrome (2322232).

The spelling of 12012111121021 in words is "twelve trillion, twelve billion, one hundred eleven million, one hundred twenty-one thousand, twenty-one".