22219012181 has 2 divisors, whose sum is σ = 22219012182. Its totient is φ = 22219012180.

The previous prime is 22219012169. The next prime is 22219012183. The reversal of 22219012181 is 18121091222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22190869156 + 28143025 = 148966^2 + 5305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22219012181 is a prime.

It is a super-2 number, since 2×22219012181² (a number of 21 digits) contains 22 as substring.

Together with 22219012183, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22219012183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11109506090 + 11109506091.

It is an arithmetic number, because the mean of its divisors is an integer number (11109506091).

Almost surely, 2^22219012181 is an apocalyptic number.

It is an amenable number.

22219012181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22219012181 is an equidigital number, since it uses as much as digits as its factorization.

22219012181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 22219012181 in words is "twenty-two billion, two hundred nineteen million, twelve thousand, one hundred eighty-one".