1001211111105 has 8 divisors (see below), whose sum is σ = 1601937777792. Its totient is φ = 533979259248.

The previous prime is 1001211111053. The next prime is 1001211111137. The reversal of 1001211111105 is 5011111121001.

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

It is not a de Polignac number, because 1001211111105 - 2¹⁵ = 1001211078337 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: 66747407407 = 1001211111105 / (1 + 0 + 0 + 1 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 0 + 5).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33373703689 + ... + 33373703718.

It is an arithmetic number, because the mean of its divisors is an integer number (200242222224).

Almost surely, 2^{1001211111105} is an apocalyptic number.

1001211111105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001211111105 is a deficient number, since it is larger than the sum of its proper divisors (600726666687).

1001211111105 is an equidigital number, since it uses as much as digits as its factorization.

1001211111105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66747407415.

The product of its (nonzero) digits is 10, while the sum is 15.

Adding to 1001211111105 its reverse (5011111121001), we get a palindrome (6012322232106).

The spelling of 1001211111105 in words is "one trillion, one billion, two hundred eleven million, one hundred eleven thousand, one hundred five".