20001231210312 has 96 divisors (see below), whose sum is σ = 59101068368160. Its totient is φ = 6060310272000.

The previous prime is 20001231210223. The next prime is 20001231210319. The reversal of 20001231210312 is 21301213210002.

20001231210312 is a `hidden beast` number, since 20 + 0 + 0 + 12 + 312 + 10 + 312 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20001231210319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5811112 + ... + 8589032.

It is an arithmetic number, because the mean of its divisors is an integer number (615636128835).

Almost surely, 2^{20001231210312} is an apocalyptic number.

20001231210312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20001231210312 is an abundant number, since it is smaller than the sum of its proper divisors (39099837157848).

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

20001231210312 is a wasteful number, since it uses less digits than its factorization.

20001231210312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2787035 (or 2787028 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20001231210312 its reverse (21301213210002), we get a palindrome (41302444420314).

The spelling of 20001231210312 in words is "twenty trillion, one billion, two hundred thirty-one million, two hundred ten thousand, three hundred twelve".