11031021 has 12 divisors (see below), whose sum is σ = 15985372. Its totient is φ = 7330176.

The previous prime is 11031019. The next prime is 11031023. The reversal of 11031021 is 12013011.

11031021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11031019) and next prime (11031023).

It can be written as a sum of positive squares in 2 ways, for example, as 1334025 + 9696996 = 1155^2 + 3114^2 .

It is not a de Polignac number, because 11031021 - 2¹ = 11031019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11030994 and 11031012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11031023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1215 + ... + 4851.

Almost surely, 2^11031021 is an apocalyptic number.

It is an amenable number.

11031021 is a deficient number, since it is larger than the sum of its proper divisors (4954351).

11031021 is a wasteful number, since it uses less digits than its factorization.

11031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3980 (or 3977 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 11031021 is about 3321.2980896029. The cubic root of 11031021 is about 222.6068737085.

Adding to 11031021 its reverse (12013011), we get a palindrome (23044032).

The spelling of 11031021 in words is "eleven million, thirty-one thousand, twenty-one".