1200330181 has 2 divisors, whose sum is σ = 1200330182. Its totient is φ = 1200330180.

The previous prime is 1200330179. The next prime is 1200330193. The reversal of 1200330181 is 1810330021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1054041156 + 146289025 = 32466^2 + 12095^2 .

It is an emirp because it is prime and its reverse (1810330021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200330181 - 2¹ = 1200330179 is a prime.

It is a super-2 number, since 2×1200330181² = 2881585086838985522, which contains 22 as substring.

Together with 1200330179, 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 (1200330581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600165090 + 600165091.

It is an arithmetic number, because the mean of its divisors is an integer number (600165091).

Almost surely, 2^1200330181 is an apocalyptic number.

It is an amenable number.

1200330181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200330181 is an equidigital number, since it uses as much as digits as its factorization.

1200330181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1200330181 is about 34645.7815758282. The cubic root of 1200330181 is about 1062.7560240418.

The spelling of 1200330181 in words is "one billion, two hundred million, three hundred thirty thousand, one hundred eighty-one".