20133132221 has 4 divisors (see below), whose sum is σ = 20245608000. Its totient is φ = 20020656444.

The previous prime is 20133132199. The next prime is 20133132223. The reversal of 20133132221 is 12223133102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12223133102 = 2 ⋅6111566551.

It is a cyclic number.

It is not a de Polignac number, because 20133132221 - 2⁶ = 20133132157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20133132193 and 20133132202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133132223) 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, 56237621 + ... + 56237978.

It is an arithmetic number, because the mean of its divisors is an integer number (5061402000).

Almost surely, 2^20133132221 is an apocalyptic number.

It is an amenable number.

20133132221 is a deficient number, since it is larger than the sum of its proper divisors (112475779).

20133132221 is a wasteful number, since it uses less digits than its factorization.

20133132221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112475778.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20133132221 its reverse (12223133102), we get a palindrome (32356265323).

The spelling of 20133132221 in words is "twenty billion, one hundred thirty-three million, one hundred thirty-two thousand, two hundred twenty-one".