20112100123312 has 40 divisors (see below), whose sum is σ = 41261100098256. Its totient is φ = 9464123559936.

The previous prime is 20112100123301. The next prime is 20112100123333. The reversal of 20112100123312 is 21332100121102.

It is a self number, because there is not a number n which added to its sum of digits gives 20112100123312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5055688 + ... + 8110744.

Almost surely, 2^{20112100123312} is an apocalyptic number.

It is an amenable number.

20112100123312 is an abundant number, since it is smaller than the sum of its proper divisors (21148999974944).

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

20112100123312 is a wasteful number, since it uses less digits than its factorization.

20112100123312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3079285 (or 3079279 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 20112100123312 its reverse (21332100121102), we get a palindrome (41444200244414).

The spelling of 20112100123312 in words is "twenty trillion, one hundred twelve billion, one hundred million, one hundred twenty-three thousand, three hundred twelve".