1011440221 has 8 divisors (see below), whose sum is σ = 1141437600. Its totient is φ = 887784240.

The previous prime is 1011440201. The next prime is 1011440237. The reversal of 1011440221 is 1220441101.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1011440221 - 2¹¹ = 1011438173 is a prime.

It is a super-2 number, since 2×1011440221² = 2046022641313057682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1011440195 and 1011440204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011440201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1585011 + ... + 1585648.

It is an arithmetic number, because the mean of its divisors is an integer number (142679700).

Almost surely, 2^1011440221 is an apocalyptic number.

1011440221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1011440221 is a deficient number, since it is larger than the sum of its proper divisors (129997379).

1011440221 is a wasteful number, since it uses less digits than its factorization.

1011440221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3170699.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1011440221 is about 31803.1479731174. The cubic root of 1011440221 is about 1003.7989566527.

Adding to 1011440221 its reverse (1220441101), we get a palindrome (2231881322).

The spelling of 1011440221 in words is "one billion, eleven million, four hundred forty thousand, two hundred twenty-one".