21121002201112 has 64 divisors (see below), whose sum is σ = 44783548012800. Its totient is φ = 9250371123840.

The previous prime is 21121002201041. The next prime is 21121002201127. The reversal of 21121002201112 is 21110220012112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7254358 + ... + 9740005.

It is an arithmetic number, because the mean of its divisors is an integer number (699742937700).

Almost surely, 2^{21121002201112} is an apocalyptic number.

21121002201112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21121002201112 is an abundant number, since it is smaller than the sum of its proper divisors (23662545811688).

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

21121002201112 is a wasteful number, since it uses less digits than its factorization.

21121002201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16994896 (or 16994892 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21121002201112 its reverse (21110220012112), we get a palindrome (42231222213224).

The spelling of 21121002201112 in words is "twenty-one trillion, one hundred twenty-one billion, two million, two hundred one thousand, one hundred twelve".