212232111181 has 2 divisors, whose sum is σ = 212232111182. Its totient is φ = 212232111180.

The previous prime is 212232111137. The next prime is 212232111197. The reversal of 212232111181 is 181111232212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192070951081 + 20161160100 = 438259^2 + 141990^2 .

It is a cyclic number.

It is not a de Polignac number, because 212232111181 - 2²⁵ = 212198556749 is a prime.

It is a super-2 number, since 2×212232111181² (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 (212232111881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106116055590 + 106116055591.

It is an arithmetic number, because the mean of its divisors is an integer number (106116055591).

Almost surely, 2^212232111181 is an apocalyptic number.

It is an amenable number.

212232111181 is a deficient number, since it is larger than the sum of its proper divisors (1).

212232111181 is an equidigital number, since it uses as much as digits as its factorization.

212232111181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 384, while the sum is 25.

Adding to 212232111181 its reverse (181111232212), we get a palindrome (393343343393).

The spelling of 212232111181 in words is "two hundred twelve billion, two hundred thirty-two million, one hundred eleven thousand, one hundred eighty-one".