20123422111 has 4 divisors (see below), whose sum is σ = 21671377672. Its totient is φ = 18575466552.

The previous prime is 20123422069. The next prime is 20123422117. The reversal of 20123422111 is 11122432102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122432102 = 2 ⋅5561216051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20123422111 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 (20123422117) 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, 773977761 + ... + 773977786.

It is an arithmetic number, because the mean of its divisors is an integer number (5417844418).

Almost surely, 2^20123422111 is an apocalyptic number.

20123422111 is a deficient number, since it is larger than the sum of its proper divisors (1547955561).

20123422111 is a wasteful number, since it uses less digits than its factorization.

20123422111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547955560.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20123422111 its reverse (11122432102), we get a palindrome (31245854213).

Subtracting from 20123422111 its reverse (11122432102), we obtain a palindrome (9000990009).

The spelling of 20123422111 in words is "twenty billion, one hundred twenty-three million, four hundred twenty-two thousand, one hundred eleven".