20111120020195 has 4 divisors (see below), whose sum is σ = 24133344024240. Its totient is φ = 16088896016152.

The previous prime is 20111120020109. The next prime is 20111120020219. The reversal of 20111120020195 is 59102002111102.

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-20111120020195 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011112002015 + ... + 2011112002024.

It is an arithmetic number, because the mean of its divisors is an integer number (6033336006060).

Almost surely, 2^{20111120020195} is an apocalyptic number.

20111120020195 is a deficient number, since it is larger than the sum of its proper divisors (4022224004045).

20111120020195 is an equidigital number, since it uses as much as digits as its factorization.

20111120020195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4022224004044.

The product of its (nonzero) digits is 360, while the sum is 25.

Adding to 20111120020195 its reverse (59102002111102), we get a palindrome (79213122131297).

The spelling of 20111120020195 in words is "twenty trillion, one hundred eleven billion, one hundred twenty million, twenty thousand, one hundred ninety-five".