1111040221 has 4 divisors (see below), whose sum is σ = 1112691772. Its totient is φ = 1109388672.

The previous prime is 1111040131. The next prime is 1111040233. The reversal of 1111040221 is 1220401111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220401111 = 21563 ⋅56597.

It can be written as a sum of positive squares in 2 ways, for example, as 375816996 + 735223225 = 19386^2 + 27115^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111040221 - 2¹³ = 1111032029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111040251) by changing a digit.

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, 824766 + ... + 826111.

It is an arithmetic number, because the mean of its divisors is an integer number (278172943).

Almost surely, 2^1111040221 is an apocalyptic number.

It is an amenable number.

1111040221 is a deficient number, since it is larger than the sum of its proper divisors (1651551).

1111040221 is an equidigital number, since it uses as much as digits as its factorization.

1111040221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651550.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1111040221 is about 33332.2699647054. The cubic root of 1111040221 is about 1035.7221409771.

Adding to 1111040221 its reverse (1220401111), we get a palindrome (2331441332).

The spelling of 1111040221 in words is "one billion, one hundred eleven million, forty thousand, two hundred twenty-one".