2001022012111 has 18 divisors (see below), whose sum is σ = 2184656362728. Its totient is φ = 1832414071680.

The previous prime is 2001022012097. The next prime is 2001022012147. The reversal of 2001022012111 is 1112102201002.

It is not a de Polignac number, because 2001022012111 - 2¹⁹ = 2001021487823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001022012091 and 2001022012100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001022012181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2133195 + ... + 2924476.

Almost surely, 2^{2001022012111} is an apocalyptic number.

2001022012111 is a deficient number, since it is larger than the sum of its proper divisors (183634350617).

2001022012111 is an equidigital number, since it uses as much as digits as its factorization.

2001022012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057779 (or 5057725 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001022012111 its reverse (1112102201002), we get a palindrome (3113124213113).

The spelling of 2001022012111 in words is "two trillion, one billion, twenty-two million, twelve thousand, one hundred eleven".