20012111011001 has 16 divisors (see below), whose sum is σ = 22517394560640. Its totient is φ = 17692238551680.

The previous prime is 20012111010917. The next prime is 20012111011037. The reversal of 20012111011001 is 10011011121002.

It is a cyclic number.

It is not a de Polignac number, because 20012111011001 - 2³⁴ = 19994931141817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012111011091) 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 15 ways as a sum of consecutive naturals, for example, 558449210 + ... + 558485043.

It is an arithmetic number, because the mean of its divisors is an integer number (1407337160040).

Almost surely, 2^{20012111011001} is an apocalyptic number.

It is an amenable number.

20012111011001 is a deficient number, since it is larger than the sum of its proper divisors (2505283549639).

20012111011001 is a wasteful number, since it uses less digits than its factorization.

20012111011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116934336.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 20012111011001 its reverse (10011011121002), we get a palindrome (30023122132003).

The spelling of 20012111011001 in words is "twenty trillion, twelve billion, one hundred eleven million, eleven thousand, one".