101021228 has 48 divisors (see below), whose sum is σ = 221211648. Its totient is φ = 39216000.

The previous prime is 101021227. The next prime is 101021251. The reversal of 101021228 is 822120101.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (101021227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132368 + ... + 133128.

It is an arithmetic number, because the mean of its divisors is an integer number (4608576).

Almost surely, 2^101021228 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 101021228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110605824).

101021228 is an abundant number, since it is smaller than the sum of its proper divisors (120190420).

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

101021228 is a wasteful number, since it uses less digits than its factorization.

101021228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214 (or 1212 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 101021228 is about 10050.9316981064. The cubic root of 101021228 is about 465.7335752268.

Adding to 101021228 its reverse (822120101), we get a palindrome (923141329).

The spelling of 101021228 in words is "one hundred one million, twenty-one thousand, two hundred twenty-eight".