14211220401221 has 16 divisors (see below), whose sum is σ = 14447387026800. Its totient is φ = 13977600514560.

The previous prime is 14211220401211. The next prime is 14211220401239. The reversal of 14211220401221 is 12210402211241.

It can be written as a sum of positive squares in 8 ways, for example, as 6316103870596 + 7895116530625 = 2513186^2 + 2809825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14211220401221 is a prime.

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 (14211220401211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5152991 + ... + 7414563.

It is an arithmetic number, because the mean of its divisors is an integer number (902961689175).

Almost surely, 2^{14211220401221} is an apocalyptic number.

It is an amenable number.

14211220401221 is a deficient number, since it is larger than the sum of its proper divisors (236166625579).

14211220401221 is a wasteful number, since it uses less digits than its factorization.

14211220401221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2262136.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 14211220401221 its reverse (12210402211241), we get a palindrome (26421622612462).

The spelling of 14211220401221 in words is "fourteen trillion, two hundred eleven billion, two hundred twenty million, four hundred one thousand, two hundred twenty-one".