11001021312 has 64 divisors (see below), whose sum is σ = 29241225360. Its totient is φ = 3664527360.

The previous prime is 11001021307. The next prime is 11001021319. The reversal of 11001021312 is 21312010011.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001021319) 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, 610512 + ... + 628272.

Almost surely, 2^11001021312 is an apocalyptic number.

11001021312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11001021312 is an abundant number, since it is smaller than the sum of its proper divisors (18240204048).

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

11001021312 is a wasteful number, since it uses less digits than its factorization.

11001021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19391 (or 19379 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 11001021312 its reverse (21312010011), we get a palindrome (32313031323).

The spelling of 11001021312 in words is "eleven billion, one million, twenty-one thousand, three hundred twelve".