1121221005 has 8 divisors (see below), whose sum is σ = 1793953632. Its totient is φ = 597984528.

The previous prime is 1121220967. The next prime is 1121221019. The reversal of 1121221005 is 5001221211.

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

It is not a de Polignac number, because 1121221005 - 2¹¹ = 1121218957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 74748067 = 1121221005 / (1 + 1 + 2 + 1 + 2 + 2 + 1 + 0 + 0 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37374019 + ... + 37374048.

It is an arithmetic number, because the mean of its divisors is an integer number (224244204).

Almost surely, 2^1121221005 is an apocalyptic number.

1121221005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121221005 is a deficient number, since it is larger than the sum of its proper divisors (672732627).

1121221005 is an equidigital number, since it uses as much as digits as its factorization.

1121221005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74748075.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1121221005 is about 33484.6383435748. The cubic root of 1121221005 is about 1038.8760679126.

Adding to 1121221005 its reverse (5001221211), we get a palindrome (6122442216).

The spelling of 1121221005 in words is "one billion, one hundred twenty-one million, two hundred twenty-one thousand, five".