12101001111 has 6 divisors (see below), whose sum is σ = 17479223840. Its totient is φ = 8067334068.

The previous prime is 12101001103. The next prime is 12101001127. The reversal of 12101001111 is 11110010121.

It is not a de Polignac number, because 12101001111 - 2³ = 12101001103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 1344555679 = 12101001111 / (1 + 2 + 1 + 0 + 1 + 0 + 0 + 1 + 1 + 1 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12101001093 and 12101001102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101021111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672277831 + ... + 672277848.

Almost surely, 2^12101001111 is an apocalyptic number.

12101001111 is a deficient number, since it is larger than the sum of its proper divisors (5378222729).

12101001111 is a wasteful number, since it uses less digits than its factorization.

12101001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344555685 (or 1344555682 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 12101001111 its reverse (11110010121), we get a palindrome (23211011232).

The spelling of 12101001111 in words is "twelve billion, one hundred one million, one thousand, one hundred eleven".