12111021101 has 4 divisors (see below), whose sum is σ = 12112274400. Its totient is φ = 12109767804.

The previous prime is 12111021089. The next prime is 12111021113. The reversal of 12111021101 is 10112011121.

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: 10112011121 = 59 ⋅171390019.

It is an interprime number because it is at equal distance from previous prime (12111021089) and next prime (12111021113).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12111021101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111021161) 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, 612041 + ... + 631518.

It is an arithmetic number, because the mean of its divisors is an integer number (3028068600).

Almost surely, 2^12111021101 is an apocalyptic number.

It is an amenable number.

12111021101 is a deficient number, since it is larger than the sum of its proper divisors (1253299).

12111021101 is an equidigital number, since it uses as much as digits as its factorization.

12111021101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253298.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12111021101 its reverse (10112011121), we get a palindrome (22223032222).

The spelling of 12111021101 in words is "twelve billion, one hundred eleven million, twenty-one thousand, one hundred one".