20011023111200 has 144 divisors (see below), whose sum is σ = 54166649987520. Its totient is φ = 7157444736000.

The previous prime is 20011023111193. The next prime is 20011023111217. The reversal of 20011023111200 is 211132011002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18102380 + ... + 19175979.

It is an arithmetic number, because the mean of its divisors is an integer number (376157291580).

Almost surely, 2^{20011023111200} is an apocalyptic number.

20011023111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011023111200 is an abundant number, since it is smaller than the sum of its proper divisors (34155626876320).

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

20011023111200 is a wasteful number, since it uses less digits than its factorization.

20011023111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37278451 (or 37278438 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 20011023111200 its reverse (211132011002), we get a palindrome (20222155122202).

It can be divided in two parts, 2001 and 1023111200, that added together give a palindrome (1023113201).

The spelling of 20011023111200 in words is "twenty trillion, eleven billion, twenty-three million, one hundred eleven thousand, two hundred".