12021611 has 6 divisors (see below), whose sum is σ = 13984380. Its totient is φ = 10304196.

The previous prime is 12021593. The next prime is 12021629. The reversal of 12021611 is 11612021.

It is an interprime number because it is at equal distance from previous prime (12021593) and next prime (12021629).

It is not a de Polignac number, because 12021611 - 2²² = 7827307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021641) 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 5 ways as a sum of consecutive naturals, for example, 122621 + ... + 122718.

It is an arithmetic number, because the mean of its divisors is an integer number (2330730).

Almost surely, 2^12021611 is an apocalyptic number.

12021611 is a deficient number, since it is larger than the sum of its proper divisors (1962769).

12021611 is an equidigital number, since it uses as much as digits as its factorization.

12021611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245353 (or 245346 counting only the distinct ones).

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

The square root of 12021611 is about 3467.2194911773. The cubic root of 12021611 is about 229.0802017536.

Adding to 12021611 its reverse (11612021), we get a palindrome (23633632).

The spelling of 12021611 in words is "twelve million, twenty-one thousand, six hundred eleven".