10020021228 has 36 divisors (see below), whose sum is σ = 28946728720. Its totient is φ = 2862863136.

The previous prime is 10020021211. The next prime is 10020021233. The reversal of 10020021228 is 82212002001.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 10020021228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19880743 + ... + 19881246.

Almost surely, 2^10020021228 is an apocalyptic number.

10020021228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

10020021228 is an abundant number, since it is smaller than the sum of its proper divisors (18926707492).

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

10020021228 is a wasteful number, since it uses less digits than its factorization.

10020021228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39762006 (or 39762001 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 10020021228 its reverse (82212002001), we get a palindrome (92232023229).

The spelling of 10020021228 in words is "ten billion, twenty million, twenty-one thousand, two hundred twenty-eight".