20011211202100 has 72 divisors (see below), whose sum is σ = 45060030848448. Its totient is φ = 7708216185600.

The previous prime is 20011211202097. The next prime is 20011211202167. The reversal of 20011211202100 is 120211211002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32467729 + ... + 33078328.

It is an arithmetic number, because the mean of its divisors is an integer number (625833761784).

Almost surely, 2^{20011211202100} is an apocalyptic number.

20011211202100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011211202100 is an abundant number, since it is smaller than the sum of its proper divisors (25048819646348).

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

20011211202100 is a wasteful number, since it uses less digits than its factorization.

20011211202100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65546185 (or 65546178 counting only the distinct ones).

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

Adding to 20011211202100 its reverse (120211211002), we get a palindrome (20131422413102).

The spelling of 20011211202100 in words is "twenty trillion, eleven billion, two hundred eleven million, two hundred two thousand, one hundred".