20031123121200 has 180 divisors, whose sum is σ = 69713893045368. Its totient is φ = 5326238745600.

The previous prime is 20031123121171. The next prime is 20031123121249. The reversal of 20031123121200 is 212132113002.

20031123121200 is a `hidden beast` number, since 2 + 0 + 0 + 311 + 231 + 2 + 120 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-3 number, since 3×20031123121200³ (a number of 41 digits) contains 333 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6768381 + ... + 9266780.

Almost surely, 2^{20031123121200} is an apocalyptic number.

20031123121200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20031123121200 is an abundant number, since it is smaller than the sum of its proper divisors (49682769924168).

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

20031123121200 is a wasteful number, since it uses less digits than its factorization.

20031123121200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16035532 (or 16035518 counting only the distinct ones).

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

Adding to 20031123121200 its reverse (212132113002), we get a palindrome (20243255234202).

The spelling of 20031123121200 in words is "twenty trillion, thirty-one billion, one hundred twenty-three million, one hundred twenty-one thousand, two hundred".