12139222 has 4 divisors (see below), whose sum is σ = 18208836. Its totient is φ = 6069610.

The previous prime is 12139189. The next prime is 12139229. The reversal of 12139222 is 22293121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22293121 = 61 ⋅365461.

It is a junction number, because it is equal to n+sod(n) for n = 12139193 and 12139202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3034804 + ... + 3034807.

It is an arithmetic number, because the mean of its divisors is an integer number (4552209).

Almost surely, 2^12139222 is an apocalyptic number.

12139222 is a deficient number, since it is larger than the sum of its proper divisors (6069614).

12139222 is an equidigital number, since it uses as much as digits as its factorization.

12139222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6069613.

The product of its digits is 432, while the sum is 22.

The square root of 12139222 is about 3484.1386309962. The cubic root of 12139222 is about 229.8248319693.

The spelling of 12139222 in words is "twelve million, one hundred thirty-nine thousand, two hundred twenty-two".