20200111111111 has 4 divisors (see below), whose sum is σ = 20200146166152. Its totient is φ = 20200076056072.

The previous prime is 20200111111051. The next prime is 20200111111133. The reversal of 20200111111111 is 11111111100202.

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 20200111111111 - 2²⁵ = 20200077556679 is a prime.

It is a Duffinian number.

20200111111111 is a modest number, since divided by 11111111 gives 202001 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 20200111111091 and 20200111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20200111111171) 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, 16648465 + ... + 17820538.

It is an arithmetic number, because the mean of its divisors is an integer number (5050036541538).

Almost surely, 2^{20200111111111} is an apocalyptic number.

20200111111111 is a deficient number, since it is larger than the sum of its proper divisors (35055041).

20200111111111 is an equidigital number, since it uses as much as digits as its factorization.

20200111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35055040.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 20200111111111 its reverse (11111111100202), we get a palindrome (31311222211313).

The spelling of 20200111111111 in words is "twenty trillion, two hundred billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".