11021889312 has 72 divisors (see below), whose sum is σ = 35821146816. Its totient is φ = 3149110656.

The previous prime is 11021889287. The next prime is 11021889331. The reversal of 11021889312 is 21398812011.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2731588 + ... + 2735619.

It is an arithmetic number, because the mean of its divisors is an integer number (497515928).

Almost surely, 2^11021889312 is an apocalyptic number.

11021889312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11021889312 is an abundant number, since it is smaller than the sum of its proper divisors (24799257504).

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

11021889312 is a wasteful number, since it uses less digits than its factorization.

11021889312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5467230 (or 5467219 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The spelling of 11021889312 in words is "eleven billion, twenty-one million, eight hundred eighty-nine thousand, three hundred twelve".