1244211100 has 144 divisors (see below), whose sum is σ = 3037305600. Its totient is φ = 438592000.

The previous prime is 1244211097. The next prime is 1244211109. The reversal of 1244211100 is 11124421.

It is a happy number.

It is a super-2 number, since 2×1244211100² = 3096122522726420000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1244211109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6950811 + ... + 6950989.

It is an arithmetic number, because the mean of its divisors is an integer number (21092400).

Almost surely, 2^1244211100 is an apocalyptic number.

1244211100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1244211100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1518652800).

1244211100 is an abundant number, since it is smaller than the sum of its proper divisors (1793094500).

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

1244211100 is a wasteful number, since it uses less digits than its factorization.

1244211100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1244211100 is about 35273.3766458501. The cubic root of 1244211100 is about 1075.5518637524.

Adding to 1244211100 its reverse (11124421), we get a palindrome (1255335521).

It can be divided in two parts, 124421 and 1100, that added together give a palindrome (125521).

The spelling of 1244211100 in words is "one billion, two hundred forty-four million, two hundred eleven thousand, one hundred".