1011222222228 has 18 divisors (see below), whose sum is σ = 2556145061834. Its totient is φ = 337074074064.

The previous prime is 1011222222221. The next prime is 1011222222251. The reversal of 1011222222228 is 8222222221101.

1011222222228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 633867560964 + 377354661264 = 796158^2 + 614292^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011222222221) 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, 14044753051 + ... + 14044753122.

Almost surely, 2^{1011222222228} is an apocalyptic number.

1011222222228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1011222222228 is an abundant number, since it is smaller than the sum of its proper divisors (1544922839606).

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

1011222222228 is a wasteful number, since it uses less digits than its factorization.

1011222222228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28089506183 (or 28089506178 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

Adding to 1011222222228 its reverse (8222222221101), we get a palindrome (9233444443329).

The spelling of 1011222222228 in words is "one trillion, eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-eight".