22211200181 has 2 divisors, whose sum is σ = 22211200182. Its totient is φ = 22211200180.

The previous prime is 22211200163. The next prime is 22211200273. The reversal of 22211200181 is 18100211222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11779846225 + 10431353956 = 108535^2 + 102134^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22211200181 is a prime.

It is a super-2 number, since 2×22211200181² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22211200481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105600090 + 11105600091.

It is an arithmetic number, because the mean of its divisors is an integer number (11105600091).

Almost surely, 2^22211200181 is an apocalyptic number.

It is an amenable number.

22211200181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211200181 is an equidigital number, since it uses as much as digits as its factorization.

22211200181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The spelling of 22211200181 in words is "twenty-two billion, two hundred eleven million, two hundred thousand, one hundred eighty-one".