11202021 has 12 divisors (see below), whose sum is σ = 16218540. Its totient is φ = 7450560.

The previous prime is 11202019. The next prime is 11202041. The reversal of 11202021 is 12020211.

It can be written as a sum of positive squares in 2 ways, for example, as 2873025 + 8328996 = 1695^2 + 2886^2 .

It is not a de Polignac number, because 11202021 - 2¹ = 11202019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 11201994 and 11202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202041) 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, 3495 + ... + 5883.

It is an arithmetic number, because the mean of its divisors is an integer number (1351545).

Almost surely, 2^11202021 is an apocalyptic number.

It is an amenable number.

11202021 is a deficient number, since it is larger than the sum of its proper divisors (5016519).

11202021 is a wasteful number, since it uses less digits than its factorization.

11202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916 (or 2913 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 11202021 is about 3346.9420371438. The cubic root of 11202021 is about 223.7512451685.

Adding to 11202021 its reverse (12020211), we get a palindrome (23222232).

The spelling of 11202021 in words is "eleven million, two hundred two thousand, twenty-one".