1244221000 has 64 divisors (see below), whose sum is σ = 3176184960. Its totient is φ = 452440000.

The previous prime is 1244220997. The next prime is 1244221009. The reversal of 1244221000 is 1224421.

It is not an unprimeable number, because it can be changed into a prime (1244221009) 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, 45556 + ... + 67555.

It is an arithmetic number, because the mean of its divisors is an integer number (49627890).

Almost surely, 2^1244221000 is an apocalyptic number.

1244221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1244221000 is an abundant number, since it is smaller than the sum of its proper divisors (1931963960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1244221000 is a wasteful number, since it uses less digits than its factorization.

1244221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113143 (or 113129 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 1244221000 is about 35273.5169780389. The cubic root of 1244221000 is about 1075.5547164128.

Adding to 1244221000 its reverse (1224421), we get a palindrome (1245445421).

The spelling of 1244221000 in words is "one billion, two hundred forty-four million, two hundred twenty-one thousand".