12112201022021 has 4 divisors (see below), whose sum is σ = 12113756069100. Its totient is φ = 12110645974944.

The previous prime is 12112201022017. The next prime is 12112201022029. The reversal of 12112201022021 is 12022010221121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5251494724996 + 6860706297025 = 2291614^2 + 2619295^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112201022021 - 2² = 12112201022017 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 (12112201022029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777511856 + ... + 777527433.

It is an arithmetic number, because the mean of its divisors is an integer number (3028439017275).

Almost surely, 2^{12112201022021} is an apocalyptic number.

It is an amenable number.

12112201022021 is a deficient number, since it is larger than the sum of its proper divisors (1555047079).

12112201022021 is an equidigital number, since it uses as much as digits as its factorization.

12112201022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1555047078.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12112201022021 its reverse (12022010221121), we get a palindrome (24134211243142).

The spelling of 12112201022021 in words is "twelve trillion, one hundred twelve billion, two hundred one million, twenty-two thousand, twenty-one".