20332142221 has 4 divisors (see below), whose sum is σ = 20335341952. Its totient is φ = 20328942492.

The previous prime is 20332142197. The next prime is 20332142251. The reversal of 20332142221 is 12224123302.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20332142221 - 2¹¹ = 20332140173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20332142192 and 20332142201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332142251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1590315 + ... + 1603048.

It is an arithmetic number, because the mean of its divisors is an integer number (5083835488).

Almost surely, 2^20332142221 is an apocalyptic number.

It is an amenable number.

20332142221 is a deficient number, since it is larger than the sum of its proper divisors (3199731).

20332142221 is an equidigital number, since it uses as much as digits as its factorization.

20332142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199730.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20332142221 its reverse (12224123302), we get a palindrome (32556265523).

It can be divided in two parts, 203321 and 42221, that added together give a palindrome (245542).

The spelling of 20332142221 in words is "twenty billion, three hundred thirty-two million, one hundred forty-two thousand, two hundred twenty-one".