20112102211011 has 4 divisors (see below), whose sum is σ = 26816136281352. Its totient is φ = 13408068140672.

The previous prime is 20112102211009. The next prime is 20112102211039. The reversal of 20112102211011 is 11011220121102.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 20112102211011 - 2¹ = 20112102211009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112102211001) 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, 3352017035166 + ... + 3352017035171.

It is an arithmetic number, because the mean of its divisors is an integer number (6704034070338).

Almost surely, 2^{20112102211011} is an apocalyptic number.

20112102211011 is a deficient number, since it is larger than the sum of its proper divisors (6704034070341).

20112102211011 is an equidigital number, since it uses as much as digits as its factorization.

20112102211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6704034070340.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 20112102211011 its reverse (11011220121102), we get a palindrome (31123322332113).

The spelling of 20112102211011 in words is "twenty trillion, one hundred twelve billion, one hundred two million, two hundred eleven thousand, eleven".