2001023011111 has 8 divisors (see below), whose sum is σ = 2055131305184. Its totient is φ = 1946916116640.

The previous prime is 2001023011067. The next prime is 2001023011147. The reversal of 2001023011111 is 1111103201002.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2001023011111 - 2⁷ = 2001023010983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001023011091 and 2001023011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001023011811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2967781 + ... + 3579073.

It is an arithmetic number, because the mean of its divisors is an integer number (256891413148).

Almost surely, 2^{2001023011111} is an apocalyptic number.

2001023011111 is a deficient number, since it is larger than the sum of its proper divisors (54108294073).

2001023011111 is an equidigital number, since it uses as much as digits as its factorization.

2001023011111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699801.

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

Adding to 2001023011111 its reverse (1111103201002), we get a palindrome (3112126212113).

The spelling of 2001023011111 in words is "two trillion, one billion, twenty-three million, eleven thousand, one hundred eleven".