1001213444 has 24 divisors (see below), whose sum is σ = 2184466368. Its totient is φ = 390083040.

The previous prime is 1001213443. The next prime is 1001213449. The reversal of 1001213444 is 4443121001.

1001213444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1001213444² = 2004856720892682272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1001213441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1625039 + ... + 1625654.

It is an arithmetic number, because the mean of its divisors is an integer number (91019432).

Almost surely, 2^1001213444 is an apocalyptic number.

1001213444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1001213444 is an abundant number, since it is smaller than the sum of its proper divisors (1183252924).

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

1001213444 is a wasteful number, since it uses less digits than its factorization.

1001213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3250715 (or 3250713 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1001213444 is about 31641.9570191226. The cubic root of 1001213444 is about 1000.4043178384.

Adding to 1001213444 its reverse (4443121001), we get a palindrome (5444334445).

The spelling of 1001213444 in words is "one billion, one million, two hundred thirteen thousand, four hundred forty-four".