1230105181 has 2 divisors, whose sum is σ = 1230105182. Its totient is φ = 1230105180.

The previous prime is 1230105161. The next prime is 1230105187. The reversal of 1230105181 is 1815010321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 968765625 + 261339556 = 31125^2 + 16166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1230105181 is a prime.

It is a super-2 number, since 2×1230105181² = 3026317512646085522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1230105187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615052590 + 615052591.

It is an arithmetic number, because the mean of its divisors is an integer number (615052591).

Almost surely, 2^1230105181 is an apocalyptic number.

It is an amenable number.

1230105181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230105181 is an equidigital number, since it uses as much as digits as its factorization.

1230105181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 1230105181 is about 35072.8553300127. The cubic root of 1230105181 is about 1071.4718095423.

The spelling of 1230105181 in words is "one billion, two hundred thirty million, one hundred five thousand, one hundred eighty-one".