10021122220 has 24 divisors (see below), whose sum is σ = 21131687808. Its totient is φ = 3991814400.

The previous prime is 10021122197. The next prime is 10021122233. The reversal of 10021122220 is 2222112001.

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 10021122220.

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, 1034716 + ... + 1044355.

It is an arithmetic number, because the mean of its divisors is an integer number (880486992).

Almost surely, 2^10021122220 is an apocalyptic number.

10021122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021122220 is an abundant number, since it is smaller than the sum of its proper divisors (11110565588).

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

10021122220 is a wasteful number, since it uses less digits than its factorization.

10021122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2079321 (or 2079319 counting only the distinct ones).

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

Adding to 10021122220 its reverse (2222112001), we get a palindrome (12243234221).

The spelling of 10021122220 in words is "ten billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty".