11211213444 has 48 divisors (see below), whose sum is σ = 26392396800. Its totient is φ = 3703946400.

The previous prime is 11211213367. The next prime is 11211213467. The reversal of 11211213444 is 44431211211.

It is a happy number.

It is a super-2 number, since 2×11211213444² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619119 + ... + 636969.

It is an arithmetic number, because the mean of its divisors is an integer number (549841600).

Almost surely, 2^11211213444 is an apocalyptic number.

It is an amenable number.

11211213444 is an abundant number, since it is smaller than the sum of its proper divisors (15181183356).

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

11211213444 is a wasteful number, since it uses less digits than its factorization.

11211213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18320 (or 18318 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

Adding to 11211213444 its reverse (44431211211), we get a palindrome (55642424655).

The spelling of 11211213444 in words is "eleven billion, two hundred eleven million, two hundred thirteen thousand, four hundred forty-four".