20212332203221 has 4 divisors (see below), whose sum is σ = 20213784983052. Its totient is φ = 20210879423392.

The previous prime is 20212332203177. The next prime is 20212332203233. The reversal of 20212332203221 is 12230223321202.

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 17629593935121 + 2582738268100 = 4198761^2 + 1607090^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212332203221 - 2²⁷ = 20212197985493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212332209221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 726369046 + ... + 726396871.

It is an arithmetic number, because the mean of its divisors is an integer number (5053446245763).

Almost surely, 2^{20212332203221} is an apocalyptic number.

It is an amenable number.

20212332203221 is a deficient number, since it is larger than the sum of its proper divisors (1452779831).

20212332203221 is a wasteful number, since it uses less digits than its factorization.

20212332203221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452779830.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20212332203221 its reverse (12230223321202), we get a palindrome (32442555524423).

The spelling of 20212332203221 in words is "twenty trillion, two hundred twelve billion, three hundred thirty-two million, two hundred three thousand, two hundred twenty-one".