30401220181 has 2 divisors, whose sum is σ = 30401220182. Its totient is φ = 30401220180.

The previous prime is 30401220167. The next prime is 30401220197. The reversal of 30401220181 is 18102210403.

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., 16394497681 + 14006722500 = 128041^2 + 118350^2 .

It is a cyclic number.

It is not a de Polignac number, because 30401220181 - 2⁷ = 30401220053 is a prime.

It is a super-2 number, since 2×30401220181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30401226181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15200610090 + 15200610091.

It is an arithmetic number, because the mean of its divisors is an integer number (15200610091).

Almost surely, 2^30401220181 is an apocalyptic number.

It is an amenable number.

30401220181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30401220181 is an equidigital number, since it uses as much as digits as its factorization.

30401220181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 30401220181 its reverse (18102210403), we get a palindrome (48503430584).

It can be divided in two parts, 3040 and 1220181, that added together give a palindrome (1223221).

The spelling of 30401220181 in words is "thirty billion, four hundred one million, two hundred twenty thousand, one hundred eighty-one".