102211201181 has 2 divisors, whose sum is σ = 102211201182. Its totient is φ = 102211201180.

The previous prime is 102211201159. The next prime is 102211201201. The reversal of 102211201181 is 181102112201.

It is a happy number.

It is an a-pointer prime, because the next prime (102211201201) can be obtained adding 102211201181 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53665892281 + 48545308900 = 231659^2 + 220330^2 .

It is a cyclic number.

It is not a de Polignac number, because 102211201181 - 2⁶ = 102211201117 is a prime.

It is a super-2 number, since 2×102211201181² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102211204181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51105600590 + 51105600591.

It is an arithmetic number, because the mean of its divisors is an integer number (51105600591).

Almost surely, 2^102211201181 is an apocalyptic number.

It is an amenable number.

102211201181 is a deficient number, since it is larger than the sum of its proper divisors (1).

102211201181 is an equidigital number, since it uses as much as digits as its factorization.

102211201181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 102211201181 its reverse (181102112201), we get a palindrome (283313313382).

The spelling of 102211201181 in words is "one hundred two billion, two hundred eleven million, two hundred one thousand, one hundred eighty-one".