1031411021 has 4 divisors (see below), whose sum is σ = 1034176572. Its totient is φ = 1028645472.

The previous prime is 1031411009. The next prime is 1031411027. The reversal of 1031411021 is 1201141301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201141301 = 61 ⋅19690841.

It can be written as a sum of positive squares in 2 ways, for example, as 228312100 + 803098921 = 15110^2 + 28339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031411021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1031410987 and 1031411005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031411027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1382216 + ... + 1382961.

It is an arithmetic number, because the mean of its divisors is an integer number (258544143).

Almost surely, 2^1031411021 is an apocalyptic number.

It is an amenable number.

1031411021 is a deficient number, since it is larger than the sum of its proper divisors (2765551).

1031411021 is an equidigital number, since it uses as much as digits as its factorization.

1031411021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2765550.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1031411021 is about 32115.5884423748. The cubic root of 1031411021 is about 1010.3625862177.

Adding to 1031411021 its reverse (1201141301), we get a palindrome (2232552322).

The spelling of 1031411021 in words is "one billion, thirty-one million, four hundred eleven thousand, twenty-one".