12221126 has 4 divisors (see below), whose sum is σ = 18331692. Its totient is φ = 6110562.

The previous prime is 12221117. The next prime is 12221171. The reversal of 12221126 is 62112221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62112221 = 733 ⋅84737.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055280 + ... + 3055283.

It is an arithmetic number, because the mean of its divisors is an integer number (4582923).

Almost surely, 2^12221126 is an apocalyptic number.

12221126 is a deficient number, since it is larger than the sum of its proper divisors (6110566).

12221126 is an equidigital number, since it uses as much as digits as its factorization.

12221126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110565.

The product of its digits is 96, while the sum is 17.

The square root of 12221126 is about 3495.8727093531. The cubic root of 12221126 is about 230.3405541040.

Adding to 12221126 its reverse (62112221), we get a palindrome (74333347).

The spelling of 12221126 in words is "twelve million, two hundred twenty-one thousand, one hundred twenty-six".