20121111010011 has 16 divisors (see below), whose sum is σ = 29619685872000. Its totient is φ = 12047689686720.

The previous prime is 20121111009977. The next prime is 20121111010061. The reversal of 20121111010011 is 11001011112102.

It is not a de Polignac number, because 20121111010011 - 2²¹ = 20121108912859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121111010061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3673073386 + ... + 3673078863.

It is an arithmetic number, because the mean of its divisors is an integer number (1851230367000).

Almost surely, 2^{20121111010011} is an apocalyptic number.

20121111010011 is a deficient number, since it is larger than the sum of its proper divisors (9498574861989).

20121111010011 is a wasteful number, since it uses less digits than its factorization.

20121111010011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346152346.

The product of its (nonzero) digits is 4, while the sum is 12.

Adding to 20121111010011 its reverse (11001011112102), we get a palindrome (31122122122113).

The spelling of 20121111010011 in words is "twenty trillion, one hundred twenty-one billion, one hundred eleven million, ten thousand, eleven".