12122819 has 4 divisors (see below), whose sum is σ = 12835944. Its totient is φ = 11409696.

The previous prime is 12122813. The next prime is 12122821. The reversal of 12122819 is 91822121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91822121 = 1373 ⋅66877.

It is a cyclic number.

It is not a de Polignac number, because 12122819 - 2⁸ = 12122563 is a prime.

It is a super-2 number, since 2×12122819² = 293925481013522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12122813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 356537 + ... + 356570.

It is an arithmetic number, because the mean of its divisors is an integer number (3208986).

Almost surely, 2^12122819 is an apocalyptic number.

12122819 is a deficient number, since it is larger than the sum of its proper divisors (713125).

12122819 is an equidigital number, since it uses as much as digits as its factorization.

12122819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713124.

The product of its digits is 576, while the sum is 26.

The square root of 12122819 is about 3481.7838818629. The cubic root of 12122819 is about 229.7212691553.

The spelling of 12122819 in words is "twelve million, one hundred twenty-two thousand, eight hundred nineteen".