21152244112 has 40 divisors (see below), whose sum is σ = 43028496000. Its totient is φ = 10059004032.

The previous prime is 21152244097. The next prime is 21152244121. The reversal of 21152244112 is 21144225112.

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, 309112 + ... + 371287.

It is an arithmetic number, because the mean of its divisors is an integer number (1075712400).

Almost surely, 2^21152244112 is an apocalyptic number.

It is an amenable number.

21152244112 is an abundant number, since it is smaller than the sum of its proper divisors (21876251888).

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

21152244112 is a wasteful number, since it uses less digits than its factorization.

21152244112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680503 (or 680497 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

Adding to 21152244112 its reverse (21144225112), we get a palindrome (42296469224).

The spelling of 21152244112 in words is "twenty-one billion, one hundred fifty-two million, two hundred forty-four thousand, one hundred twelve".