210020021010 has 192 divisors, whose sum is σ = 570136320000. Its totient is φ = 53573667840.

The previous prime is 210020021009. The next prime is 210020021027. The reversal of 210020021010 is 10120020012.

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 = 210020020983 and 210020021001.

It is an unprimeable number.

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 95 ways as a sum of consecutive naturals, for example, 145947871 + ... + 145949309.

It is an arithmetic number, because the mean of its divisors is an integer number (2969460000).

Almost surely, 2^210020021010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210020021010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (285068160000).

210020021010 is an abundant number, since it is smaller than the sum of its proper divisors (360116298990).

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

210020021010 is a wasteful number, since it uses less digits than its factorization.

210020021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961 (or 1958 counting only the distinct ones).

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

Adding to 210020021010 its reverse (10120020012), we get a palindrome (220140041022).

The spelling of 210020021010 in words is "two hundred ten billion, twenty million, twenty-one thousand, ten".