12100021211 has 4 divisors (see below), whose sum is σ = 12328323552. Its totient is φ = 11871718872.

The previous prime is 12100021189. The next prime is 12100021223. The reversal of 12100021211 is 11212000121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12100021211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100021192 and 12100021201.

It is not an unprimeable number, because it can be changed into a prime (12100021111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114151091 + ... + 114151196.

It is an arithmetic number, because the mean of its divisors is an integer number (3082080888).

Almost surely, 2^12100021211 is an apocalyptic number.

12100021211 is a deficient number, since it is larger than the sum of its proper divisors (228302341).

12100021211 is an equidigital number, since it uses as much as digits as its factorization.

12100021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228302340.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12100021211 its reverse (11212000121), we get a palindrome (23312021332).

The spelling of 12100021211 in words is "twelve billion, one hundred million, twenty-one thousand, two hundred eleven".