20102101210020 has 24 divisors (see below), whose sum is σ = 56285883388224. Its totient is φ = 5360560322656.

The previous prime is 20102101209973. The next prime is 20102101210021. The reversal of 20102101210020 is 2001210120102.

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

It is a junction number, because it is equal to n+sod(n) for n = 20102101209978 and 20102101210005.

It is not an unprimeable number, because it can be changed into a prime (20102101210021) 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 7 ways as a sum of consecutive naturals, for example, 167517510024 + ... + 167517510143.

It is an arithmetic number, because the mean of its divisors is an integer number (2345245141176).

Almost surely, 2^{20102101210020} is an apocalyptic number.

20102101210020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20102101210020 is an abundant number, since it is smaller than the sum of its proper divisors (36183782178204).

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

20102101210020 is a wasteful number, since it uses less digits than its factorization.

20102101210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335035020179 (or 335035020177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20102101210020 its reverse (2001210120102), we get a palindrome (22103311330122).

The spelling of 20102101210020 in words is "twenty trillion, one hundred two billion, one hundred one million, two hundred ten thousand, twenty".