10202121228 has 96 divisors (see below), whose sum is σ = 25911325440. Its totient is φ = 3105573120.

The previous prime is 10202121221. The next prime is 10202121253. The reversal of 10202121228 is 82212120201.

It is not an unprimeable number, because it can be changed into a prime (10202121221) 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, 9543078 + ... + 9544146.

It is an arithmetic number, because the mean of its divisors is an integer number (269909640).

Almost surely, 2^10202121228 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 10202121228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12955662720).

10202121228 is an abundant number, since it is smaller than the sum of its proper divisors (15709204212).

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

10202121228 is a wasteful number, since it uses less digits than its factorization.

10202121228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1687 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 10202121228 its reverse (82212120201), we get a palindrome (92414241429).

The spelling of 10202121228 in words is "ten billion, two hundred two million, one hundred twenty-one thousand, two hundred twenty-eight".