1001111212211 has 8 divisors (see below), whose sum is σ = 1092129204144. Its totient is φ = 910094533920.

The previous prime is 1001111212183. The next prime is 1001111212217. The reversal of 1001111212211 is 1122121111001.

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

It is not a de Polignac number, because 1001111212211 - 2⁶ = 1001111212147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001111212217) by changing a digit.

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, 1955921 + ... + 2414093.

It is an arithmetic number, because the mean of its divisors is an integer number (136516150518).

Almost surely, 2^{1001111212211} is an apocalyptic number.

1001111212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001111212211 is a deficient number, since it is larger than the sum of its proper divisors (91017991933).

1001111212211 is a wasteful number, since it uses less digits than its factorization.

1001111212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656821.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 1001111212211 its reverse (1122121111001), we get a palindrome (2123232323212).

The spelling of 1001111212211 in words is "one trillion, one billion, one hundred eleven million, two hundred twelve thousand, two hundred eleven".