12100112211021 has 4 divisors (see below), whose sum is σ = 16133482948032. Its totient is φ = 8066741474012.

The previous prime is 12100112210983. The next prime is 12100112211023. The reversal of 12100112211021 is 12011221100121.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 12100112211021 - 2¹¹ = 12100112208973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12100112211023) 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, 2016685368501 + ... + 2016685368506.

It is an arithmetic number, because the mean of its divisors is an integer number (4033370737008).

Almost surely, 2^{12100112211021} is an apocalyptic number.

It is an amenable number.

12100112211021 is a deficient number, since it is larger than the sum of its proper divisors (4033370737011).

12100112211021 is an equidigital number, since it uses as much as digits as its factorization.

12100112211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033370737010.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12100112211021 its reverse (12011221100121), we get a palindrome (24111333311142).

The spelling of 12100112211021 in words is "twelve trillion, one hundred billion, one hundred twelve million, two hundred eleven thousand, twenty-one".