20113103221 has 2 divisors, whose sum is σ = 20113103222. Its totient is φ = 20113103220.

The previous prime is 20113103167. The next prime is 20113103267. The reversal of 20113103221 is 12230131102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19912314321 + 200788900 = 141111^2 + 14170^2 .

It is a cyclic number.

It is not a de Polignac number, because 20113103221 - 2⁷ = 20113103093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20113103195 and 20113103204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113103321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056551610 + 10056551611.

It is an arithmetic number, because the mean of its divisors is an integer number (10056551611).

Almost surely, 2^20113103221 is an apocalyptic number.

It is an amenable number.

20113103221 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113103221 is an equidigital number, since it uses as much as digits as its factorization.

20113103221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20113103221 its reverse (12230131102), we get a palindrome (32343234323).

The spelling of 20113103221 in words is "twenty billion, one hundred thirteen million, one hundred three thousand, two hundred twenty-one".