12100021111 has 2 divisors, whose sum is σ = 12100021112. Its totient is φ = 12100021110.

The previous prime is 12100021097. The next prime is 12100021189. The reversal of 12100021111 is 11112000121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12100021111 - 2¹⁵ = 12099988343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100021811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050010555 + 6050010556.

It is an arithmetic number, because the mean of its divisors is an integer number (6050010556).

Almost surely, 2^12100021111 is an apocalyptic number.

12100021111 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100021111 is an equidigital number, since it uses as much as digits as its factorization.

12100021111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12100021111 its reverse (11112000121), we get a palindrome (23212021232).

The spelling of 12100021111 in words is "twelve billion, one hundred million, twenty-one thousand, one hundred eleven".