210002001010020 has 120 divisors (see below), whose sum is σ = 658789297972344. Its totient is φ = 56000087921664.

The previous prime is 210002001010003. The next prime is 210002001010121. The reversal of 210002001010020 is 20010100200012.

It can be written as a sum of positive squares in 4 ways, for example, as 5155833257316 + 204846167752704 = 2270646^2 + 14312448^2 .

It is a super-2 number, since 2×210002001010020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 210002001009984 and 210002001010011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 236785324 + ... + 237670556.

Almost surely, 2^{210002001010020} is an apocalyptic number.

210002001010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210002001010020 is an abundant number, since it is smaller than the sum of its proper divisors (448787296962324).

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

210002001010020 is a wasteful number, since it uses less digits than its factorization.

210002001010020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031691 (or 1031680 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 210002001010020 its reverse (20010100200012), we get a palindrome (230012101210032).

The spelling of 210002001010020 in words is "two hundred ten trillion, two billion, one million, ten thousand, twenty".