20122102111 has 4 divisors (see below), whose sum is σ = 20122613632. Its totient is φ = 20121590592.

The previous prime is 20122102093. The next prime is 20122102129. The reversal of 20122102111 is 11120122102.

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

It is an interprime number because it is at equal distance from previous prime (20122102093) and next prime (20122102129).

It is a cyclic number.

It is not a de Polignac number, because 20122102111 - 2⁵ = 20122102079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20122102091 and 20122102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122102181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191346 + ... + 277231.

It is an arithmetic number, because the mean of its divisors is an integer number (5030653408).

Almost surely, 2^20122102111 is an apocalyptic number.

20122102111 is a deficient number, since it is larger than the sum of its proper divisors (511521).

20122102111 is an equidigital number, since it uses as much as digits as its factorization.

20122102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511520.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20122102111 its reverse (11120122102), we get a palindrome (31242224213).

It can be divided in two parts, 20122102 and 111, that multiplied together give a palindrome (2233553322).

The spelling of 20122102111 in words is "twenty billion, one hundred twenty-two million, one hundred two thousand, one hundred eleven".