1011201281 has 2 divisors, whose sum is σ = 1011201282. Its totient is φ = 1011201280.

The previous prime is 1011201271. The next prime is 1011201313. The reversal of 1011201281 is 1821021101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 985394881 + 25806400 = 31391^2 + 5080^2 .

It is an emirp because it is prime and its reverse (1821021101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1011201281 - 2¹⁴ = 1011184897 is a prime.

It is a super-2 number, since 2×1011201281² = 2045056061392081922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1011201211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505600640 + 505600641.

It is an arithmetic number, because the mean of its divisors is an integer number (505600641).

Almost surely, 2^1011201281 is an apocalyptic number.

It is an amenable number.

1011201281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011201281 is an equidigital number, since it uses as much as digits as its factorization.

1011201281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 1011201281 is about 31799.3912048643. The cubic root of 1011201281 is about 1003.7199054783.

Adding to 1011201281 its reverse (1821021101), we get a palindrome (2832222382).

The spelling of 1011201281 in words is "one billion, eleven million, two hundred one thousand, two hundred eighty-one".