1234204242181 has 2 divisors, whose sum is σ = 1234204242182. Its totient is φ = 1234204242180.

The previous prime is 1234204242179. The next prime is 1234204242233. The reversal of 1234204242181 is 1812424024321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1039908418081 + 194295824100 = 1019759^2 + 440790^2 .

It is a cyclic number.

It is not a de Polignac number, because 1234204242181 - 2¹ = 1234204242179 is a prime.

It is a super-3 number, since 3×1234204242181³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 1234204242179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234205242181) 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, 617102121090 + 617102121091.

It is an arithmetic number, because the mean of its divisors is an integer number (617102121091).

Almost surely, 2^{1234204242181} is an apocalyptic number.

It is an amenable number.

1234204242181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234204242181 is an equidigital number, since it uses as much as digits as its factorization.

1234204242181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24576, while the sum is 34.

The spelling of 1234204242181 in words is "one trillion, two hundred thirty-four billion, two hundred four million, two hundred forty-two thousand, one hundred eighty-one".