12101111211 has 16 divisors (see below), whose sum is σ = 18470592000. Its totient is φ = 6903369408.

The previous prime is 12101111203. The next prime is 12101111261. The reversal of 12101111211 is 11211110121.

It is not a de Polignac number, because 12101111211 - 2³ = 12101111203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12101111261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468426 + ... + 493583.

It is an arithmetic number, because the mean of its divisors is an integer number (1154412000).

Almost surely, 2^12101111211 is an apocalyptic number.

12101111211 is a deficient number, since it is larger than the sum of its proper divisors (6369480789).

12101111211 is an equidigital number, since it uses as much as digits as its factorization.

12101111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962618.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 12101111211 its reverse (11211110121), we get a palindrome (23312221332).

The spelling of 12101111211 in words is "twelve billion, one hundred one million, one hundred eleven thousand, two hundred eleven".