21010510112 has 48 divisors (see below), whose sum is σ = 42073682112. Its totient is φ = 10325387520.

The previous prime is 21010510093. The next prime is 21010510117. The reversal of 21010510112 is 21101501012.

It is not an unprimeable number, because it can be changed into a prime (21010510117) 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, 3360173 + ... + 3366419.

It is an arithmetic number, because the mean of its divisors is an integer number (876535044).

Almost surely, 2^21010510112 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 21010510112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21036841056).

21010510112 is an abundant number, since it is smaller than the sum of its proper divisors (21063172000).

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

21010510112 is a wasteful number, since it uses less digits than its factorization.

21010510112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8041 (or 8033 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 14.

The spelling of 21010510112 in words is "twenty-one billion, ten million, five hundred ten thousand, one hundred twelve".