20312102111 has 4 divisors (see below), whose sum is σ = 23213830992. Its totient is φ = 17410373232.

The previous prime is 20312102087. The next prime is 20312102119. The reversal of 20312102111 is 11120121302.

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

It is not a de Polignac number, because 20312102111 - 2¹⁸ = 20311839967 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 (20312102119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450864430 + ... + 1450864443.

It is an arithmetic number, because the mean of its divisors is an integer number (5803457748).

Almost surely, 2^20312102111 is an apocalyptic number.

20312102111 is a deficient number, since it is larger than the sum of its proper divisors (2901728881).

20312102111 is an equidigital number, since it uses as much as digits as its factorization.

20312102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2901728880.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20312102111 its reverse (11120121302), we get a palindrome (31432223413).

The spelling of 20312102111 in words is "twenty billion, three hundred twelve million, one hundred two thousand, one hundred eleven".