12219001 has 4 divisors (see below), whose sum is σ = 12240000. Its totient is φ = 12198004.

The previous prime is 12218989. The next prime is 12219007. The reversal of 12219001 is 10091221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10091221 = 7 ⋅1441603.

It is a cyclic number.

It is not a de Polignac number, because 12219001 - 2⁷ = 12218873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12219007) 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, 9601 + ... + 10798.

It is an arithmetic number, because the mean of its divisors is an integer number (3060000).

Almost surely, 2^12219001 is an apocalyptic number.

It is an amenable number.

12219001 is a deficient number, since it is larger than the sum of its proper divisors (20999).

12219001 is an equidigital number, since it uses as much as digits as its factorization.

12219001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20998.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 12219001 is about 3495.5687663097. The cubic root of 12219001 is about 230.3272028506.

The spelling of 12219001 in words is "twelve million, two hundred nineteen thousand, one".