12012122021 has 8 divisors (see below), whose sum is σ = 12745278720. Its totient is φ = 11281916608.

The previous prime is 12012122009. The next prime is 12012122029. The reversal of 12012122021 is 12022121021.

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 12012122021 - 2¹⁸ = 12011859877 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012121987 and 12012122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012122029) 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, 729431 + ... + 745716.

It is an arithmetic number, because the mean of its divisors is an integer number (1593159840).

Almost surely, 2^12012122021 is an apocalyptic number.

It is an amenable number.

12012122021 is a deficient number, since it is larger than the sum of its proper divisors (733156699).

12012122021 is a wasteful number, since it uses less digits than its factorization.

12012122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475643.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12012122021 its reverse (12022121021), we get a palindrome (24034243042).

The spelling of 12012122021 in words is "twelve billion, twelve million, one hundred twenty-two thousand, twenty-one".