20010222022181 has 2 divisors, whose sum is σ = 20010222022182. Its totient is φ = 20010222022180.

The previous prime is 20010222022159. The next prime is 20010222022213. The reversal of 20010222022181 is 18122022201002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20009652436225 + 569585956 = 4473215^2 + 23866^2 .

It is a cyclic number.

It is not a de Polignac number, because 20010222022181 - 2⁶ = 20010222022117 is a prime.

It is a super-2 number, since 2×20010222022181² (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 (20010122022181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005111011090 + 10005111011091.

It is an arithmetic number, because the mean of its divisors is an integer number (10005111011091).

Almost surely, 2^{20010222022181} is an apocalyptic number.

It is an amenable number.

20010222022181 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010222022181 is an equidigital number, since it uses as much as digits as its factorization.

20010222022181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 20010222022181 its reverse (18122022201002), we get a palindrome (38132244223183).

The spelling of 20010222022181 in words is "twenty trillion, ten billion, two hundred twenty-two million, twenty-two thousand, one hundred eighty-one".