1001231120011 has 4 divisors (see below), whose sum is σ = 1001286802152. Its totient is φ = 1001175437872.

The previous prime is 1001231119991. The next prime is 1001231120023. The reversal of 1001231120011 is 1100211321001.

It is a happy number.

1001231120011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001231120011 - 2¹¹ = 1001231117963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001231119973 and 1001231120000.

It is not an unprimeable number, because it can be changed into a prime (1001231120051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27814090 + ... + 27850063.

It is an arithmetic number, because the mean of its divisors is an integer number (250321700538).

Almost surely, 2^{1001231120011} is an apocalyptic number.

1001231120011 is a deficient number, since it is larger than the sum of its proper divisors (55682141).

1001231120011 is an equidigital number, since it uses as much as digits as its factorization.

1001231120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55682140.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 1001231120011 its reverse (1100211321001), we get a palindrome (2101442441012).

The spelling of 1001231120011 in words is "one trillion, one billion, two hundred thirty-one million, one hundred twenty thousand, eleven".