1021041181 has 2 divisors, whose sum is σ = 1021041182. Its totient is φ = 1021041180.

The previous prime is 1021041121. The next prime is 1021041223. The reversal of 1021041181 is 1811401201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1002292281 + 18748900 = 31659^2 + 4330^2 .

It is an emirp because it is prime and its reverse (1811401201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021041181 - 2⁷ = 1021041053 is a prime.

It is a super-2 number, since 2×1021041181² = 2085050186595749522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021041121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510520590 + 510520591.

It is an arithmetic number, because the mean of its divisors is an integer number (510520591).

Almost surely, 2^1021041181 is an apocalyptic number.

It is an amenable number.

1021041181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021041181 is an equidigital number, since it uses as much as digits as its factorization.

1021041181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 19.

The square root of 1021041181 is about 31953.7350086027. The cubic root of 1021041181 is about 1006.9651017261.

Adding to 1021041181 its reverse (1811401201), we get a palindrome (2832442382).

It can be divided in two parts, 102104 and 1181, that added together give a triangular number (103285 = T₄₅₄).

The spelling of 1021041181 in words is "one billion, twenty-one million, forty-one thousand, one hundred eighty-one".