1116332621 has 4 divisors (see below), whose sum is σ = 1116471552. Its totient is φ = 1116193692.

The previous prime is 1116332603. The next prime is 1116332639. The reversal of 1116332621 is 1262336111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1262336111 = 449 ⋅2811439.

It is an interprime number because it is at equal distance from previous prime (1116332603) and next prime (1116332639).

It is a cyclic number.

It is not a de Polignac number, because 1116332621 - 2¹⁸ = 1116070477 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 (1116332671) 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, 56621 + ... + 73746.

It is an arithmetic number, because the mean of its divisors is an integer number (279117888).

Almost surely, 2^1116332621 is an apocalyptic number.

It is an amenable number.

1116332621 is a deficient number, since it is larger than the sum of its proper divisors (138931).

1116332621 is an equidigital number, since it uses as much as digits as its factorization.

1116332621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138930.

The product of its digits is 1296, while the sum is 26.

The square root of 1116332621 is about 33411.5641806845. The cubic root of 1116332621 is about 1037.3640783084.

Adding to 1116332621 its reverse (1262336111), we get a palindrome (2378668732).

The spelling of 1116332621 in words is "one billion, one hundred sixteen million, three hundred thirty-two thousand, six hundred twenty-one".