12012021211 has 8 divisors (see below), whose sum is σ = 12774643920. Its totient is φ = 11255624448.

The previous prime is 12012021199. The next prime is 12012021221. The reversal of 12012021211 is 11212021021.

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-12012021211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012021191 and 12012021200.

It is not an unprimeable number, because it can be changed into a prime (12012021221) 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, 1552506 + ... + 1560223.

It is an arithmetic number, because the mean of its divisors is an integer number (1596830490).

Almost surely, 2^12012021211 is an apocalyptic number.

12012021211 is a deficient number, since it is larger than the sum of its proper divisors (762622709).

12012021211 is a wasteful number, since it uses less digits than its factorization.

12012021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3112973.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12012021211 its reverse (11212021021), we get a palindrome (23224042232).

The spelling of 12012021211 in words is "twelve billion, twelve million, twenty-one thousand, two hundred eleven".