12211020444 has 24 divisors (see below), whose sum is σ = 32562721408. Its totient is φ = 3488862960.

The previous prime is 12211020427. The next prime is 12211020463. The reversal of 12211020444 is 44402011221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12211020444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72684562 + ... + 72684729.

Almost surely, 2^12211020444 is an apocalyptic number.

12211020444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12211020444 is an abundant number, since it is smaller than the sum of its proper divisors (20351700964).

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

12211020444 is a wasteful number, since it uses less digits than its factorization.

12211020444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145369305 (or 145369303 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 12211020444 its reverse (44402011221), we get a palindrome (56613031665).

The spelling of 12211020444 in words is "twelve billion, two hundred eleven million, twenty thousand, four hundred forty-four".