21021011102112 has 192 divisors, whose sum is σ = 63926821969920. Its totient is φ = 5923893620736.

The previous prime is 21021011101921. The next prime is 21021011102167. The reversal of 21021011102112 is 21120111012012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21021011102091 and 21021011102100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51664333 + ... + 52069619.

It is an arithmetic number, because the mean of its divisors is an integer number (332952197760).

Almost surely, 2^{21021011102112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21021011102112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31963410984960).

21021011102112 is an abundant number, since it is smaller than the sum of its proper divisors (42905810867808).

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

21021011102112 is a wasteful number, since it uses less digits than its factorization.

21021011102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406363 (or 406355 counting only the distinct ones).

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

Adding to 21021011102112 its reverse (21120111012012), we get a palindrome (42141122114124).

The spelling of 21021011102112 in words is "twenty-one trillion, twenty-one billion, eleven million, one hundred two thousand, one hundred twelve".