1101123202181 has 2 divisors, whose sum is σ = 1101123202182. Its totient is φ = 1101123202180.

The previous prime is 1101123202169. The next prime is 1101123202199. The reversal of 1101123202181 is 1812023211011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878465680225 + 222657521956 = 937265^2 + 471866^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101123202181 - 2²⁶ = 1101056093317 is a prime.

It is a super-2 number, since 2×1101123202181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1101123202121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550561601090 + 550561601091.

It is an arithmetic number, because the mean of its divisors is an integer number (550561601091).

Almost surely, 2^{1101123202181} is an apocalyptic number.

It is an amenable number.

1101123202181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101123202181 is an equidigital number, since it uses as much as digits as its factorization.

1101123202181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 1101123202181 its reverse (1812023211011), we get a palindrome (2913146413192).

The spelling of 1101123202181 in words is "one trillion, one hundred one billion, one hundred twenty-three million, two hundred two thousand, one hundred eighty-one".