10021212220 has 24 divisors (see below), whose sum is σ = 21064276800. Its totient is φ = 4004726592.

The previous prime is 10021212211. The next prime is 10021212259. The reversal of 10021212220 is 2221212001.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 10021212220.

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, 212980 + ... + 255739.

It is an arithmetic number, because the mean of its divisors is an integer number (877678200).

Almost surely, 2^10021212220 is an apocalyptic number.

10021212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021212220 is an abundant number, since it is smaller than the sum of its proper divisors (11043064580).

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

10021212220 is a wasteful number, since it uses less digits than its factorization.

10021212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469797 (or 469795 counting only the distinct ones).

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

Adding to 10021212220 its reverse (2221212001), we get a palindrome (12242424221).

The spelling of 10021212220 in words is "ten billion, twenty-one million, two hundred twelve thousand, two hundred twenty".