1001021111211 has 64 divisors (see below), whose sum is σ = 1497451156992. Its totient is φ = 589680000000.

The previous prime is 1001021111191. The next prime is 1001021111213. The reversal of 1001021111211 is 1121111201001.

It is not a de Polignac number, because 1001021111211 - 2⁶ = 1001021111147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1001021111213) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111207711 + ... + 111216711.

It is an arithmetic number, because the mean of its divisors is an integer number (23397674328).

Almost surely, 2^{1001021111211} is an apocalyptic number.

1001021111211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001021111211 is a deficient number, since it is larger than the sum of its proper divisors (496430045781).

1001021111211 is a wasteful number, since it uses less digits than its factorization.

1001021111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9724.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 1001021111211 its reverse (1121111201001), we get a palindrome (2122132312212).

The spelling of 1001021111211 in words is "one trillion, one billion, twenty-one million, one hundred eleven thousand, two hundred eleven".