20123112131112 has 64 divisors (see below), whose sum is σ = 52758869760000. Its totient is φ = 6383823171264.

The previous prime is 20123112131099. The next prime is 20123112131119. The reversal of 20123112131112 is 21113121132102.

It is not an unprimeable number, because it can be changed into a prime (20123112131119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91485412 + ... + 91705107.

It is an arithmetic number, because the mean of its divisors is an integer number (824357340000).

Almost surely, 2^{20123112131112} is an apocalyptic number.

It is an amenable number.

20123112131112 is an abundant number, since it is smaller than the sum of its proper divisors (32635757628888).

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

20123112131112 is a wasteful number, since it uses less digits than its factorization.

20123112131112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183190750 (or 183190746 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 21.

Adding to 20123112131112 its reverse (21113121132102), we get a palindrome (41236233263214).

The spelling of 20123112131112 in words is "twenty trillion, one hundred twenty-three billion, one hundred twelve million, one hundred thirty-one thousand, one hundred twelve".