21020110010112 has 72 divisors (see below), whose sum is σ = 55948599797776. Its totient is φ = 7006145642496.

The previous prime is 21020110010099. The next prime is 21020110010171. The reversal of 21020110010112 is 21101001102012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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, 8622288 + ... + 10788144.

Almost surely, 2^{21020110010112} is an apocalyptic number.

It is an amenable number.

21020110010112 is an abundant number, since it is smaller than the sum of its proper divisors (34928489787664).

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

21020110010112 is a wasteful number, since it uses less digits than its factorization.

21020110010112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178513 (or 2178499 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21020110010112 its reverse (21101001102012), we get a palindrome (42121111112124).

The spelling of 21020110010112 in words is "twenty-one trillion, twenty billion, one hundred ten million, ten thousand, one hundred twelve".