20011210102100 has 108 divisors (see below), whose sum is σ = 50516062702560. Its totient is φ = 6860707761600.

The previous prime is 20011210102073. The next prime is 20011210102109. The reversal of 20011210102100 is 120101211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20011210102109) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 147378041 + ... + 147513759.

It is an arithmetic number, because the mean of its divisors is an integer number (467741321320).

Almost surely, 2^{20011210102100} is an apocalyptic number.

20011210102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20011210102100 is an abundant number, since it is smaller than the sum of its proper divisors (30504852600460).

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

20011210102100 is a wasteful number, since it uses less digits than its factorization.

20011210102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165838 (or 165824 counting only the distinct ones).

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

Adding to 20011210102100 its reverse (120101211002), we get a palindrome (20131311313102).

The spelling of 20011210102100 in words is "twenty trillion, eleven billion, two hundred ten million, one hundred two thousand, one hundred".