20022201112181 has 2 divisors, whose sum is σ = 20022201112182. Its totient is φ = 20022201112180.

The previous prime is 20022201112169. The next prime is 20022201112211. The reversal of 20022201112181 is 18121110222002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19119718212100 + 902482900081 = 4372610^2 + 949991^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20022201112181 is a prime.

It is a super-2 number, since 2×20022201112181² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20022261112181) 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, 10011100556090 + 10011100556091.

It is an arithmetic number, because the mean of its divisors is an integer number (10011100556091).

Almost surely, 2^{20022201112181} is an apocalyptic number.

It is an amenable number.

20022201112181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20022201112181 is an equidigital number, since it uses as much as digits as its factorization.

20022201112181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 23.

Adding to 20022201112181 its reverse (18121110222002), we get a palindrome (38143311334183).

The spelling of 20022201112181 in words is "twenty trillion, twenty-two billion, two hundred one million, one hundred twelve thousand, one hundred eighty-one".