20012010111011 has 4 divisors (see below), whose sum is σ = 20477405695032. Its totient is φ = 19546614526992.

The previous prime is 20012010110941. The next prime is 20012010111031. The reversal of 20012010111011 is 11011101021002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20012010111011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012010110983 and 20012010111001.

It is not an unprimeable number, because it can be changed into a prime (20012010111031) 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, 232697791946 + ... + 232697792031.

It is an arithmetic number, because the mean of its divisors is an integer number (5119351423758).

Almost surely, 2^{20012010111011} is an apocalyptic number.

20012010111011 is a deficient number, since it is larger than the sum of its proper divisors (465395584021).

20012010111011 is an equidigital number, since it uses as much as digits as its factorization.

20012010111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465395584020.

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

Adding to 20012010111011 its reverse (11011101021002), we get a palindrome (31023111132013).

Subtracting from 20012010111011 its reverse (11011101021002), we obtain a palindrome (9000909090009).

The spelling of 20012010111011 in words is "twenty trillion, twelve billion, ten million, one hundred eleven thousand, eleven".