12111002101 has 4 divisors (see below), whose sum is σ = 13212002304. Its totient is φ = 11010001900.

The previous prime is 12111002077. The next prime is 12111002131. The reversal of 12111002101 is 10120011121.

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: 10120011121 = 11 ⋅920001011.

It is a cyclic number.

It is not a de Polignac number, because 12111002101 - 2⁹ = 12111001589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111002131) 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, 550500085 + ... + 550500106.

It is an arithmetic number, because the mean of its divisors is an integer number (3303000576).

Almost surely, 2^12111002101 is an apocalyptic number.

12111002101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111002101 is a deficient number, since it is larger than the sum of its proper divisors (1101000203).

12111002101 is a wasteful number, since it uses less digits than its factorization.

12111002101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101000202.

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

Adding to 12111002101 its reverse (10120011121), we get a palindrome (22231013222).

The spelling of 12111002101 in words is "twelve billion, one hundred eleven million, two thousand, one hundred one".