20311120323111 has 4 divisors (see below), whose sum is σ = 27081493764152. Its totient is φ = 13540746882072.

The previous prime is 20311120323079. The next prime is 20311120323127. The reversal of 20311120323111 is 11132302111302.

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

It is not a de Polignac number, because 20311120323111 - 2⁵ = 20311120323079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311120323311) 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, 3385186720516 + ... + 3385186720521.

It is an arithmetic number, because the mean of its divisors is an integer number (6770373441038).

Almost surely, 2^{20311120323111} is an apocalyptic number.

20311120323111 is a deficient number, since it is larger than the sum of its proper divisors (6770373441041).

20311120323111 is an equidigital number, since it uses as much as digits as its factorization.

20311120323111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6770373441040.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 20311120323111 its reverse (11132302111302), we get a palindrome (31443422434413).

The spelling of 20311120323111 in words is "twenty trillion, three hundred eleven billion, one hundred twenty million, three hundred twenty-three thousand, one hundred eleven".