12111110101 has 4 divisors (see below), whose sum is σ = 12501791104. Its totient is φ = 11720429100.

The previous prime is 12111110059. The next prime is 12111110113. The reversal of 12111110101 is 10101111121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10101111121 = 1553 ⋅6504257.

It is a cyclic number.

It is not a de Polignac number, because 12111110101 - 2²⁵ = 12077555669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111110201) 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, 195340455 + ... + 195340516.

It is an arithmetic number, because the mean of its divisors is an integer number (3125447776).

Almost surely, 2^12111110101 is an apocalyptic number.

It is an amenable number.

12111110101 is a deficient number, since it is larger than the sum of its proper divisors (390681003).

12111110101 is an equidigital number, since it uses as much as digits as its factorization.

12111110101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390681002.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 12111110101 its reverse (10101111121), we get a palindrome (22212221222).

The spelling of 12111110101 in words is "twelve billion, one hundred eleven million, one hundred ten thousand, one hundred one".