1011222440 has 16 divisors (see below), whose sum is σ = 2275250580. Its totient is φ = 404488960.

The previous prime is 1011222419. The next prime is 1011222493. The reversal of 1011222440 is 442221101.

It can be written as a sum of positive squares in 2 ways, for example, as 974813284 + 36409156 = 31222^2 + 6034^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12640241 + ... + 12640320.

Almost surely, 2^1011222440 is an apocalyptic number.

1011222440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011222440 is an abundant number, since it is smaller than the sum of its proper divisors (1264028140).

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

1011222440 is a wasteful number, since it uses less digits than its factorization.

1011222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25280572 (or 25280568 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1011222440 is about 31799.7238981724. The cubic root of 1011222440 is about 1003.7269062478.

Adding to 1011222440 its reverse (442221101), we get a palindrome (1453443541).

The spelling of 1011222440 in words is "one billion, eleven million, two hundred twenty-two thousand, four hundred forty".