21210121011112 has 16 divisors (see below), whose sum is σ = 43384338432000. Its totient is φ = 9640964095920.

The previous prime is 21210121011097. The next prime is 21210121011119. The reversal of 21210121011112 is 21111012101212.

21210121011112 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (21210121011119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120512051112 + ... + 120512051287.

It is an arithmetic number, because the mean of its divisors is an integer number (2711521152000).

Almost surely, 2^{21210121011112} is an apocalyptic number.

21210121011112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21210121011112 is an abundant number, since it is smaller than the sum of its proper divisors (22174217420888).

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

21210121011112 is a wasteful number, since it uses less digits than its factorization.

21210121011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241024102416 (or 241024102412 counting only the distinct ones).

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

Adding to 21210121011112 its reverse (21111012101212), we get a palindrome (42321133112324).

The spelling of 21210121011112 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-one million, eleven thousand, one hundred twelve".