30133121281 has 2 divisors, whose sum is σ = 30133121282. Its totient is φ = 30133121280.

The previous prime is 30133121279. The next prime is 30133121297. The reversal of 30133121281 is 18212133103.

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., 17445126400 + 12687994881 = 132080^2 + 112641^2 .

It is a cyclic number.

It is not a de Polignac number, because 30133121281 - 2¹ = 30133121279 is a prime.

It is a super-2 number, since 2×30133121281² (a number of 22 digits) contains 22 as substring.

Together with 30133121279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30133121981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15066560640 + 15066560641.

It is an arithmetic number, because the mean of its divisors is an integer number (15066560641).

Almost surely, 2^30133121281 is an apocalyptic number.

It is an amenable number.

30133121281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30133121281 is an equidigital number, since it uses as much as digits as its factorization.

30133121281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 30133121281 its reverse (18212133103), we get a palindrome (48345254384).

The spelling of 30133121281 in words is "thirty billion, one hundred thirty-three million, one hundred twenty-one thousand, two hundred eighty-one".