20132022221 has 4 divisors (see below), whose sum is σ = 20149483932. Its totient is φ = 20114560512.

The previous prime is 20132022193. The next prime is 20132022247. The reversal of 20132022221 is 12222023102.

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 14253733321 + 5878288900 = 119389^2 + 76670^2 .

It is a cyclic number.

It is not a de Polignac number, because 20132022221 - 2²² = 20127827917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20132022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20132022121) 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, 8729126 + ... + 8731431.

It is an arithmetic number, because the mean of its divisors is an integer number (5037370983).

Almost surely, 2^20132022221 is an apocalyptic number.

It is an amenable number.

20132022221 is a deficient number, since it is larger than the sum of its proper divisors (17461711).

20132022221 is a wasteful number, since it uses less digits than its factorization.

20132022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17461710.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 20132022221 its reverse (12222023102), we get a palindrome (32354045323).

The spelling of 20132022221 in words is "twenty billion, one hundred thirty-two million, twenty-two thousand, two hundred twenty-one".