20113322221 has 2 divisors, whose sum is σ = 20113322222. Its totient is φ = 20113322220.

The previous prime is 20113322209. The next prime is 20113322231. The reversal of 20113322221 is 12222331102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14620437225 + 5492884996 = 120915^2 + 74114^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113322221 - 2¹⁹ = 20112797933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113322231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056661110 + 10056661111.

It is an arithmetic number, because the mean of its divisors is an integer number (10056661111).

Almost surely, 2^20113322221 is an apocalyptic number.

It is an amenable number.

20113322221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113322221 is an equidigital number, since it uses as much as digits as its factorization.

20113322221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20113322221 its reverse (12222331102), we get a palindrome (32335653323).

The spelling of 20113322221 in words is "twenty billion, one hundred thirteen million, three hundred twenty-two thousand, two hundred twenty-one".