12012122121021 has 48 divisors (see below), whose sum is σ = 19026501931008. Its totient is φ = 7242271344000.

The previous prime is 12012122120989. The next prime is 12012122121023.

12012122121021 is a `hidden beast` number, since 1 + 201 + 212 + 21 + 210 + 21 = 666.

12012122121021 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12012122121021 - 2⁵ = 12012122120989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12012122120985 and 12012122121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012122121023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 193068100 + ... + 193130306.

It is an arithmetic number, because the mean of its divisors is an integer number (396385456896).

Almost surely, 2^{12012122121021} is an apocalyptic number.

12012122121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12012122121021 is a deficient number, since it is larger than the sum of its proper divisors (7014379809987).

12012122121021 is a wasteful number, since it uses less digits than its factorization.

12012122121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72322 (or 72319 counting only the distinct ones).

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

It can be divided in two parts, 1201212 and 2121021, that added together give a palindrome (3322233).

The spelling of 12012122121021 in words is "twelve trillion, twelve billion, one hundred twenty-two million, one hundred twenty-one thousand, twenty-one".