20121323110 has 16 divisors (see below), whose sum is σ = 41392436256. Its totient is φ = 6898739328.

The previous prime is 20121323093. The next prime is 20121323149. The reversal of 20121323110 is 1132312102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143723667 + ... + 143723806.

It is an arithmetic number, because the mean of its divisors is an integer number (2587027266).

Almost surely, 2^20121323110 is an apocalyptic number.

20121323110 is an abundant number, since it is smaller than the sum of its proper divisors (21271113146).

20121323110 is a wasteful number, since it uses less digits than its factorization.

20121323110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287447487.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 20121323110 its reverse (1132312102), we get a palindrome (21253635212).

The spelling of 20121323110 in words is "twenty billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred ten".