20123122110 has 128 divisors (see below), whose sum is σ = 62569221120. Its totient is φ = 4022286336.

The previous prime is 20123122057. The next prime is 20123122171. The reversal of 20123122110 is 1122132102.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 20123122110.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 142107 + ... + 245846.

It is an arithmetic number, because the mean of its divisors is an integer number (488822040).

Almost surely, 2^20123122110 is an apocalyptic number.

20123122110 is an abundant number, since it is smaller than the sum of its proper divisors (42446099010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20123122110 is a wasteful number, since it uses less digits than its factorization.

20123122110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388002.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 20123122110 its reverse (1122132102), we get a palindrome (21245254212).

The spelling of 20123122110 in words is "twenty billion, one hundred twenty-three million, one hundred twenty-two thousand, one hundred ten".