221120222211181 has 2 divisors, whose sum is σ = 221120222211182. Its totient is φ = 221120222211180.

The previous prime is 221120222211127. The next prime is 221120222211263. The reversal of 221120222211181 is 181112222021122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188975472517225 + 32144749693956 = 13746835^2 + 5669634^2 .

It is a cyclic number.

It is not a de Polignac number, because 221120222211181 - 2³³ = 221111632276589 is a prime.

It is a super-2 number, since 2×221120222211181² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221120222215181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560111105590 + 110560111105591.

It is an arithmetic number, because the mean of its divisors is an integer number (110560111105591).

Almost surely, 2^{221120222211181} is an apocalyptic number.

It is an amenable number.

221120222211181 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120222211181 is an equidigital number, since it uses as much as digits as its factorization.

221120222211181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 28.

The spelling of 221120222211181 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred twenty-two million, two hundred eleven thousand, one hundred eighty-one".