20011000111212 has 24 divisors (see below), whose sum is σ = 50937091192512. Its totient is φ = 6063939427600.

The previous prime is 20011000111199. The next prime is 20011000111213. The reversal of 20011000111212 is 21211100011002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (20011000111213) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 75799242714 + ... + 75799242977.

It is an arithmetic number, because the mean of its divisors is an integer number (2122378799688).

Almost surely, 2^{20011000111212} is an apocalyptic number.

20011000111212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20011000111212 is an abundant number, since it is smaller than the sum of its proper divisors (30926091081300).

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

20011000111212 is a wasteful number, since it uses less digits than its factorization.

20011000111212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151598485709 (or 151598485707 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20011000111212 its reverse (21211100011002), we get a palindrome (41222100122214).

The spelling of 20011000111212 in words is "twenty trillion, eleven billion, one hundred eleven thousand, two hundred twelve".