210202001020 has 72 divisors (see below), whose sum is σ = 493425903600. Its totient is φ = 75141496320.

The previous prime is 210202001011. The next prime is 210202001059. The reversal of 210202001020 is 20100202012.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 210202000988 and 210202001006.

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, 593325 + ... + 878884.

It is an arithmetic number, because the mean of its divisors is an integer number (6853137550).

Almost surely, 2^210202001020 is an apocalyptic number.

210202001020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210202001020 is an abundant number, since it is smaller than the sum of its proper divisors (283223902580).

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

210202001020 is a wasteful number, since it uses less digits than its factorization.

210202001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1472299 (or 1472286 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 210202001020 its reverse (20100202012), we get a palindrome (230302203032).

The spelling of 210202001020 in words is "two hundred ten billion, two hundred two million, one thousand, twenty".