20011212010100 has 36 divisors (see below), whose sum is σ = 44348251988544. Its totient is φ = 7834176614880.

The previous prime is 20011212010073. The next prime is 20011212010157. The reversal of 20011212010100 is 101021211002.

It is a super-2 number, since 2×20011212010100² (a number of 27 digits) contains 22 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 (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2128847642 + ... + 2128857041.

Almost surely, 2^{20011212010100} is an apocalyptic number.

20011212010100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011212010100 is an abundant number, since it is smaller than the sum of its proper divisors (24337039978444).

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

20011212010100 is a wasteful number, since it uses less digits than its factorization.

20011212010100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4257704744 (or 4257704737 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 20011212010100 its reverse (101021211002), we get a palindrome (20112233221102).

The spelling of 20011212010100 in words is "twenty trillion, eleven billion, two hundred twelve million, ten thousand, one hundred".