12201819 has 32 divisors (see below), whose sum is σ = 19975680. Its totient is φ = 6469632.

The previous prime is 12201803. The next prime is 12201821. The reversal of 12201819 is 91810221.

It is not a de Polignac number, because 12201819 - 2⁴ = 12201803 is a prime.

It is a super-2 number, since 2×12201819² = 297768773817522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12201829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20859 + ... + 21435.

It is an arithmetic number, because the mean of its divisors is an integer number (624240).

Almost surely, 2^12201819 is an apocalyptic number.

12201819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12201819 is a deficient number, since it is larger than the sum of its proper divisors (7773861).

12201819 is a wasteful number, since it uses less digits than its factorization.

12201819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 12201819 is about 3493.1102187020. The cubic root of 12201819 is about 230.2191924272.

The spelling of 12201819 in words is "twelve million, two hundred one thousand, eight hundred nineteen".