20211304234221 has 24 divisors (see below), whose sum is σ = 29559571050360. Its totient is φ = 13306545893376.

The previous prime is 20211304234201. The next prime is 20211304234229. The reversal of 20211304234221 is 12243240311202.

20211304234221 is a `hidden beast` number, since 2 + 0 + 2 + 1 + 13 + 0 + 423 + 4 + 221 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 147525128100 + 20063779106121 = 384090^2 + 4479261^2 .

It is not a de Polignac number, because 20211304234221 - 2¹⁵ = 20211304201453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211304234229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42228286 + ... + 42704223.

It is an arithmetic number, because the mean of its divisors is an integer number (1231648793765).

Almost surely, 2^{20211304234221} is an apocalyptic number.

It is an amenable number.

20211304234221 is a deficient number, since it is larger than the sum of its proper divisors (9348266816139).

20211304234221 is a wasteful number, since it uses less digits than its factorization.

20211304234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84932845 (or 84932842 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 20211304234221 its reverse (12243240311202), we get a palindrome (32454544545423).

The spelling of 20211304234221 in words is "twenty trillion, two hundred eleven billion, three hundred four million, two hundred thirty-four thousand, two hundred twenty-one".