1011012228 has 18 divisors (see below), whose sum is σ = 2555614334. Its totient is φ = 337004064.

The previous prime is 1011012157. The next prime is 1011012229. The reversal of 1011012228 is 8222101101.

It can be written as a sum of positive squares in only one way, i.e., 983951424 + 27060804 = 31368^2 + 5202^2 .

It is a tau number, because it is divible by the number of its divisors (18).

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 1011012228.

It is not an unprimeable number, because it can be changed into a prime (1011012229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14041801 + ... + 14041872.

Almost surely, 2^1011012228 is an apocalyptic number.

1011012228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1011012228 is an abundant number, since it is smaller than the sum of its proper divisors (1544602106).

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

1011012228 is a wasteful number, since it uses less digits than its factorization.

1011012228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28083683 (or 28083678 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 1011012228 is about 31796.4184775581. The cubic root of 1011012228 is about 1003.6573501494.

Adding to 1011012228 its reverse (8222101101), we get a palindrome (9233113329).

The spelling of 1011012228 in words is "one billion, eleven million, twelve thousand, two hundred twenty-eight".