12202021121 has 4 divisors (see below), whose sum is σ = 12622780500. Its totient is φ = 11781261744.

The previous prime is 12202021081. The next prime is 12202021127. The reversal of 12202021121 is 12112020221.

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 3283863025 + 8918158096 = 57305^2 + 94436^2 .

It is a cyclic number.

It is not a de Polignac number, because 12202021121 - 2¹⁸ = 12201758977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12202021096 and 12202021105.

It is not an unprimeable number, because it can be changed into a prime (12202021127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210379646 + ... + 210379703.

It is an arithmetic number, because the mean of its divisors is an integer number (3155695125).

Almost surely, 2^12202021121 is an apocalyptic number.

It is an amenable number.

12202021121 is a deficient number, since it is larger than the sum of its proper divisors (420759379).

12202021121 is an equidigital number, since it uses as much as digits as its factorization.

12202021121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420759378.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 12202021121 its reverse (12112020221), we get a palindrome (24314041342).

The spelling of 12202021121 in words is "twelve billion, two hundred two million, twenty-one thousand, one hundred twenty-one".