21002201021112 has 32 divisors (see below), whose sum is σ = 52505623645200. Its totient is φ = 7000717528064.

The previous prime is 21002201021111. The next prime is 21002201021173. The reversal of 21002201021112 is 21112010220012.

It is a junction number, because it is equal to n+sod(n) for n = 21002201021091 and 21002201021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002201021111) 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, 14442778 + ... + 15830294.

Almost surely, 2^{21002201021112} is an apocalyptic number.

It is an amenable number.

21002201021112 is an abundant number, since it is smaller than the sum of its proper divisors (31503422624088).

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

21002201021112 is a wasteful number, since it uses less digits than its factorization.

21002201021112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2018215 (or 2018211 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21002201021112 its reverse (21112010220012), we get a palindrome (42114211241124).

The spelling of 21002201021112 in words is "twenty-one trillion, two billion, two hundred one million, twenty-one thousand, one hundred twelve".