12244012221 has 32 divisors (see below), whose sum is σ = 19761988608. Its totient is φ = 6582700800.

The previous prime is 12244012199. The next prime is 12244012273. The reversal of 12244012221 is 12221044221.

It is not a de Polignac number, because 12244012221 - 2¹⁵ = 12243979453 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12244014221) 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, 1639546 + ... + 1646996.

It is an arithmetic number, because the mean of its divisors is an integer number (617562144).

Almost surely, 2^12244012221 is an apocalyptic number.

It is an amenable number.

12244012221 is a deficient number, since it is larger than the sum of its proper divisors (7517976387).

12244012221 is a wasteful number, since it uses less digits than its factorization.

12244012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12081.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12244012221 its reverse (12221044221), we get a palindrome (24465056442).

The spelling of 12244012221 in words is "twelve billion, two hundred forty-four million, twelve thousand, two hundred twenty-one".