20210120102020 has 12 divisors (see below), whose sum is σ = 42441252214284. Its totient is φ = 8084048040800.

The previous prime is 20210120101981. The next prime is 20210120102041. The reversal of 20210120102020 is 2020102101202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13995260568576 + 6214859533444 = 3741024^2 + 2492962^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 505253002531 + ... + 505253002570.

It is an arithmetic number, because the mean of its divisors is an integer number (3536771017857).

Almost surely, 2^{20210120102020} is an apocalyptic number.

20210120102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20210120102020 is an abundant number, since it is smaller than the sum of its proper divisors (22231132112264).

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

20210120102020 is a wasteful number, since it uses less digits than its factorization.

20210120102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010506005110 (or 1010506005108 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20210120102020 its reverse (2020102101202), we get a palindrome (22230222203222).

The spelling of 20210120102020 in words is "twenty trillion, two hundred ten billion, one hundred twenty million, one hundred two thousand, twenty".