1111212000181 has 2 divisors, whose sum is σ = 1111212000182. Its totient is φ = 1111212000180.

The previous prime is 1111212000137. The next prime is 1111212000229. The reversal of 1111212000181 is 1810002121111.

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., 1079084664100 + 32127336081 = 1038790^2 + 179241^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111212000181 - 2²¹ = 1111209903029 is a prime.

It is a super-2 number, since 2×1111212000181² (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 (1111212000881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555606000090 + 555606000091.

It is an arithmetic number, because the mean of its divisors is an integer number (555606000091).

Almost surely, 2^{1111212000181} is an apocalyptic number.

It is an amenable number.

1111212000181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111212000181 is an equidigital number, since it uses as much as digits as its factorization.

1111212000181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 1111212000181 its reverse (1810002121111), we get a palindrome (2921214121292).

The spelling of 1111212000181 in words is "one trillion, one hundred eleven billion, two hundred twelve million, one hundred eighty-one", and thus it is an aban number.