212022219181 has 2 divisors, whose sum is σ = 212022219182. Its totient is φ = 212022219180.

The previous prime is 212022219121. The next prime is 212022219191. The reversal of 212022219181 is 181912220212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157795645225 + 54226573956 = 397235^2 + 232866^2 .

It is a cyclic number.

It is not a de Polignac number, because 212022219181 - 2⁹ = 212022218669 is a prime.

It is a super-2 number, since 2×212022219181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212022219121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106011109590 + 106011109591.

It is an arithmetic number, because the mean of its divisors is an integer number (106011109591).

Almost surely, 2^212022219181 is an apocalyptic number.

It is an amenable number.

212022219181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212022219181 is an equidigital number, since it uses as much as digits as its factorization.

212022219181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 31.

Adding to 212022219181 its reverse (181912220212), we get a palindrome (393934439393).

The spelling of 212022219181 in words is "two hundred twelve billion, twenty-two million, two hundred nineteen thousand, one hundred eighty-one".