12201121211021 has 8 divisors (see below), whose sum is σ = 13011775479360. Its totient is φ = 11400793748928.

The previous prime is 12201121211003. The next prime is 12201121211029. The reversal of 12201121211021 is 12011212110221.

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 12201121211021 - 2²² = 12201117016717 is a prime.

It is a super-2 number, since 2×12201121211021² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201121211029) 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, 2581699121 + ... + 2581703846.

It is an arithmetic number, because the mean of its divisors is an integer number (1626471934920).

Almost surely, 2^{12201121211021} is an apocalyptic number.

It is an amenable number.

12201121211021 is a deficient number, since it is larger than the sum of its proper divisors (810654268339).

12201121211021 is a wasteful number, since it uses less digits than its factorization.

12201121211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5163403123.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12201121211021 its reverse (12011212110221), we get a palindrome (24212333321242).

It can be divided in two parts, 1 and 2201121211021, that added together give a palindrome (2201121211022).

The spelling of 12201121211021 in words is "twelve trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, twenty-one".