12201201020021 has 8 divisors (see below), whose sum is σ = 13460236773144. Its totient is φ = 10987948385280.

The previous prime is 12201201020017. The next prime is 12201201020039. The reversal of 12201201020021 is 12002010210221.

It can be written as a sum of positive squares in 4 ways, for example, as 1073739453796 + 11127461566225 = 1036214^2 + 3335785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12201201020021 - 2² = 12201201020017 is a prime.

It is a super-2 number, since 2×12201201020021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12201201019978 and 12201201020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201201020011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11445779036 + ... + 11445780101.

It is an arithmetic number, because the mean of its divisors is an integer number (1682529596643).

Almost surely, 2^{12201201020021} is an apocalyptic number.

It is an amenable number.

12201201020021 is a deficient number, since it is larger than the sum of its proper divisors (1259035753123).

12201201020021 is a wasteful number, since it uses less digits than its factorization.

12201201020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22891559191.

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

Adding to 12201201020021 its reverse (12002010210221), we get a palindrome (24203211230242).

The spelling of 12201201020021 in words is "twelve trillion, two hundred one billion, two hundred one million, twenty thousand, twenty-one".