20001212111320 has 128 divisors (see below), whose sum is σ = 51976492128000. Its totient is φ = 6850540500480.

The previous prime is 20001212111201. The next prime is 20001212111341. The reversal of 20001212111320 is 2311121210002.

It is a junction number, because it is equal to n+sod(n) for n = 20001212111294 and 20001212111303.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 5468430 + ... + 8360989.

It is an arithmetic number, because the mean of its divisors is an integer number (406066344750).

Almost surely, 2^{20001212111320} is an apocalyptic number.

20001212111320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20001212111320 is an abundant number, since it is smaller than the sum of its proper divisors (31975280016680).

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

20001212111320 is a wasteful number, since it uses less digits than its factorization.

20001212111320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13829633 (or 13829629 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20001212111320 its reverse (2311121210002), we get a palindrome (22312333321322).

The spelling of 20001212111320 in words is "twenty trillion, one billion, two hundred twelve million, one hundred eleven thousand, three hundred twenty".