1111441021 has 2 divisors, whose sum is σ = 1111441022. Its totient is φ = 1111441020.

The previous prime is 1111441013. The next prime is 1111441027. The reversal of 1111441021 is 1201441111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943349796 + 168091225 = 30714^2 + 12965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111441021 - 2³ = 1111441013 is a prime.

It is a super-2 number, since 2×1111441021² = 2470602286323044882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111440986 and 1111441004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111441027) 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, 555720510 + 555720511.

It is an arithmetic number, because the mean of its divisors is an integer number (555720511).

Almost surely, 2^1111441021 is an apocalyptic number.

It is an amenable number.

1111441021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111441021 is an equidigital number, since it uses as much as digits as its factorization.

1111441021 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 16.

The square root of 1111441021 is about 33338.2816143844. The cubic root of 1111441021 is about 1035.8466691803.

Adding to 1111441021 its reverse (1201441111), we get a palindrome (2312882132).

The spelling of 1111441021 in words is "one billion, one hundred eleven million, four hundred forty-one thousand, twenty-one".