1100121005 has 8 divisors (see below), whose sum is σ = 1320525024. Its totient is φ = 879843600.

The previous prime is 1100120999. The next prime is 1100121007. The reversal of 1100121005 is 5001210011.

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

It is not a de Polignac number, because 1100121005 - 2¹⁸ = 1099858861 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 (1100121007) 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 7 ways as a sum of consecutive naturals, for example, 11351 + ... + 48260.

It is an arithmetic number, because the mean of its divisors is an integer number (165065628).

Almost surely, 2^1100121005 is an apocalyptic number.

It is an amenable number.

1100121005 is a deficient number, since it is larger than the sum of its proper divisors (220404019).

1100121005 is an equidigital number, since it uses as much as digits as its factorization.

1100121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63307.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 1100121005 is about 33168.0720724012. The cubic root of 1100121005 is about 1032.3179659035.

Adding to 1100121005 its reverse (5001210011), we get a palindrome (6101331016).

The spelling of 1100121005 in words is "one billion, one hundred million, one hundred twenty-one thousand, five".