20012031123200 has 108 divisors (see below), whose sum is σ = 49547862645288. Its totient is φ = 8002395033600.

The previous prime is 20012031123197. The next prime is 20012031123229. The reversal of 20012031123200 is 232113021002.

It is a super-3 number, since 3×20012031123200³ (a number of 41 digits) contains 333 as substring.

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 11 ways as a sum of consecutive naturals, for example, 20796710 + ... + 21737690.

Almost surely, 2^{20012031123200} is an apocalyptic number.

20012031123200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20012031123200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24773931322644).

20012031123200 is an abundant number, since it is smaller than the sum of its proper divisors (29535831522088).

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

20012031123200 is an equidigital number, since it uses as much as digits as its factorization.

20012031123200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944330 (or 944311 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20012031123200 its reverse (232113021002), we get a palindrome (20244144144202).

The spelling of 20012031123200 in words is "twenty trillion, twelve billion, thirty-one million, one hundred twenty-three thousand, two hundred".