20022221111117 has 2 divisors, whose sum is σ = 20022221111118. Its totient is φ = 20022221111116.

The previous prime is 20022221111063. The next prime is 20022221111173. The reversal of 20022221111117 is 71111112222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19451681084836 + 570540026281 = 4410406^2 + 755341^2 .

It is a cyclic number.

It is not a de Polignac number, because 20022221111117 - 2⁸ = 20022221110861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20022221111092 and 20022221111101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022221111177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10011110555558 + 10011110555559.

It is an arithmetic number, because the mean of its divisors is an integer number (10011110555559).

Almost surely, 2^{20022221111117} is an apocalyptic number.

It is an amenable number.

20022221111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022221111117 is an equidigital number, since it uses as much as digits as its factorization.

20022221111117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 23.

Adding to 20022221111117 its reverse (71111112222002), we get a palindrome (91133333333119).

The spelling of 20022221111117 in words is "twenty trillion, twenty-two billion, two hundred twenty-one million, one hundred eleven thousand, one hundred seventeen".