11440031021 has 2 divisors, whose sum is σ = 11440031022. Its totient is φ = 11440031020.

The previous prime is 11440030997. The next prime is 11440031023. The reversal of 11440031021 is 12013004411.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11226462025 + 213568996 = 105955^2 + 14614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11440031021 - 2¹⁴ = 11440014637 is a prime.

It is a super-2 number, since 2×11440031021² (a number of 21 digits) contains 22 as substring.

Together with 11440031023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11440031023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5720015510 + 5720015511.

It is an arithmetic number, because the mean of its divisors is an integer number (5720015511).

Almost surely, 2^11440031021 is an apocalyptic number.

It is an amenable number.

11440031021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11440031021 is an equidigital number, since it uses as much as digits as its factorization.

11440031021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 11440031021 its reverse (12013004411), we get a palindrome (23453035432).

The spelling of 11440031021 in words is "eleven billion, four hundred forty million, thirty-one thousand, twenty-one".