11802021 has 32 divisors (see below), whose sum is σ = 20659200. Its totient is φ = 5806080.

The previous prime is 11802017. The next prime is 11802067. The reversal of 11802021 is 12020811.

It is not a de Polignac number, because 11802021 - 2² = 11802017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11802221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3045 + ... + 5733.

It is an arithmetic number, because the mean of its divisors is an integer number (645600).

Almost surely, 2^11802021 is an apocalyptic number.

11802021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11802021 is a deficient number, since it is larger than the sum of its proper divisors (8857179).

11802021 is a wasteful number, since it uses less digits than its factorization.

11802021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2729.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 11802021 is about 3435.4069627920. The cubic root of 11802021 is about 227.6768081713.

Adding to 11802021 its reverse (12020811), we get a palindrome (23822832).

The spelling of 11802021 in words is "eleven million, eight hundred two thousand, twenty-one".