20102011201111 has 4 divisors (see below), whose sum is σ = 22973727086992. Its totient is φ = 17230295315232.

The previous prime is 20102011201049. The next prime is 20102011201157. The reversal of 20102011201111 is 11110211020102.

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 20102011201111 - 2¹⁹ = 20102010676823 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20102011201091 and 20102011201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102011201171) 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, 1435857942930 + ... + 1435857942943.

It is an arithmetic number, because the mean of its divisors is an integer number (5743431771748).

Almost surely, 2^{20102011201111} is an apocalyptic number.

20102011201111 is a deficient number, since it is larger than the sum of its proper divisors (2871715885881).

20102011201111 is an equidigital number, since it uses as much as digits as its factorization.

20102011201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871715885880.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20102011201111 its reverse (11110211020102), we get a palindrome (31212222221213).

The spelling of 20102011201111 in words is "twenty trillion, one hundred two billion, eleven million, two hundred one thousand, one hundred eleven".