1244422221 has 16 divisors (see below), whose sum is σ = 1947513984. Its totient is φ = 691879104.

The previous prime is 1244422217. The next prime is 1244422261. The reversal of 1244422221 is 1222244421.

It is a happy number.

It is not a de Polignac number, because 1244422221 - 2² = 1244422217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244422191 and 1244422200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244422211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800010 + ... + 801563.

It is an arithmetic number, because the mean of its divisors is an integer number (121719624).

Almost surely, 2^1244422221 is an apocalyptic number.

It is an amenable number.

1244422221 is a deficient number, since it is larger than the sum of its proper divisors (703091763).

1244422221 is a wasteful number, since it uses less digits than its factorization.

1244422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1601620.

The product of its digits is 2048, while the sum is 24.

The square root of 1244422221 is about 35276.3691584040. The cubic root of 1244422221 is about 1075.6126944648.

Adding to 1244422221 its reverse (1222244421), we get a palindrome (2466666642).

The spelling of 1244422221 in words is "one billion, two hundred forty-four million, four hundred twenty-two thousand, two hundred twenty-one".