210102020120020 has 72 divisors (see below), whose sum is σ = 514468340877960. Its totient is φ = 71863873724160.

The previous prime is 210102020120011. The next prime is 210102020120039. The reversal of 210102020120020 is 20021020201012.

It is a happy number.

210102020120020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 572573702596 + 209529446417424 = 756686^2 + 14475132^2 .

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, 254207155 + ... + 255032314.

It is an arithmetic number, because the mean of its divisors is an integer number (7145393623305).

Almost surely, 2^{210102020120020} is an apocalyptic number.

210102020120020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210102020120020 is an abundant number, since it is smaller than the sum of its proper divisors (304366320757940).

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

210102020120020 is a wasteful number, since it uses less digits than its factorization.

210102020120020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509239913 (or 509239904 counting only the distinct ones).

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

Adding to 210102020120020 its reverse (20021020201012), we get a palindrome (230123040321032).

The spelling of 210102020120020 in words is "two hundred ten trillion, one hundred two billion, twenty million, one hundred twenty thousand, twenty".