11351221044 has 24 divisors (see below), whose sum is σ = 26557201440. Its totient is φ = 3773594784.

The previous prime is 11351221039. The next prime is 11351221069. The reversal of 11351221044 is 44012215311.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1263534 + ... + 1272485.

It is an arithmetic number, because the mean of its divisors is an integer number (1106550060).

Almost surely, 2^11351221044 is an apocalyptic number.

It is an amenable number.

11351221044 is an abundant number, since it is smaller than the sum of its proper divisors (15205980396).

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

11351221044 is a wasteful number, since it uses less digits than its factorization.

11351221044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536399 (or 2536397 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 11351221044 its reverse (44012215311), we get a palindrome (55363436355).

The spelling of 11351221044 in words is "eleven billion, three hundred fifty-one million, two hundred twenty-one thousand, forty-four".