20120211102100 has 36 divisors (see below), whose sum is σ = 43661056902400. Its totient is φ = 8048047793760.

The previous prime is 20120211102049. The next prime is 20120211102107. The reversal of 20120211102100 is 120111202102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120211102107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36236371 + ... + 36787429.

Almost surely, 2^{20120211102100} is an apocalyptic number.

20120211102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20120211102100 is an abundant number, since it is smaller than the sum of its proper divisors (23540845800300).

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

20120211102100 is a wasteful number, since it uses less digits than its factorization.

20120211102100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916192 (or 916185 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 20120211102100 its reverse (120111202102), we get a palindrome (20240322304202).

The spelling of 20120211102100 in words is "twenty trillion, one hundred twenty billion, two hundred eleven million, one hundred two thousand, one hundred".