21022010212 has 96 divisors (see below), whose sum is σ = 46519861248. Its totient is φ = 8099080704.

The previous prime is 21022010209. The next prime is 21022010213. The reversal of 21022010212 is 21201022012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21022010192 and 21022010201.

It is not an unprimeable number, because it can be changed into a prime (21022010213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14527273 + ... + 14528719.

It is an arithmetic number, because the mean of its divisors is an integer number (484581888).

Almost surely, 2^21022010212 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 21022010212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23259930624).

21022010212 is an abundant number, since it is smaller than the sum of its proper divisors (25497851036).

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

21022010212 is a wasteful number, since it uses less digits than its factorization.

21022010212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21022010212 its reverse (21201022012), we get a palindrome (42223032224).

The spelling of 21022010212 in words is "twenty-one billion, twenty-two million, ten thousand, two hundred twelve".