21201112011012 has 24 divisors (see below), whose sum is σ = 50521798836096. Its totient is φ = 6916674840288.

The previous prime is 21201112010989. The next prime is 21201112011067. The reversal of 21201112011012 is 21011021110212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21201112010982 and 21201112011000.

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, 18795311503 + ... + 18795312630.

It is an arithmetic number, because the mean of its divisors is an integer number (2105074951504).

Almost surely, 2^{21201112011012} is an apocalyptic number.

It is an amenable number.

21201112011012 is an abundant number, since it is smaller than the sum of its proper divisors (29320686825084).

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

21201112011012 is a wasteful number, since it uses less digits than its factorization.

21201112011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37590624187 (or 37590624185 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21201112011012 its reverse (21011021110212), we get a palindrome (42212133121224).

The spelling of 21201112011012 in words is "twenty-one trillion, two hundred one billion, one hundred twelve million, eleven thousand, twelve".