12221019 has 12 divisors (see below), whose sum is σ = 17781400. Its totient is φ = 8087904.

The previous prime is 12220997. The next prime is 12221021. The reversal of 12221019 is 91012221.

It is not a de Polignac number, because 12221019 - 2⁷ = 12220891 is a prime.

It is a super-2 number, since 2×12221019² = 298706610796722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12220992 and 12221010.

It is not an unprimeable number, because it can be changed into a prime (12221029) 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, 3634 + ... + 6135.

Almost surely, 2^12221019 is an apocalyptic number.

12221019 is a deficient number, since it is larger than the sum of its proper divisors (5560381).

12221019 is a wasteful number, since it uses less digits than its factorization.

12221019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9914 (or 9911 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12221019 is about 3495.8574055588. The cubic root of 12221019 is about 230.3398818661.

The spelling of 12221019 in words is "twelve million, two hundred twenty-one thousand, nineteen".