210012211020 has 144 divisors (see below), whose sum is σ = 611156216160. Its totient is φ = 53820383232.

The previous prime is 210012210979. The next prime is 210012211061. The reversal of 210012211020 is 20112210012.

It is an interprime number because it is at equal distance from previous prime (210012210979) and next prime (210012211061).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210012210987 and 210012211005.

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 47 ways as a sum of consecutive naturals, for example, 99389484 + ... + 99391596.

It is an arithmetic number, because the mean of its divisors is an integer number (4244140390).

Almost surely, 2^210012211020 is an apocalyptic number.

210012211020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210012211020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305578108080).

210012211020 is an abundant number, since it is smaller than the sum of its proper divisors (401144005140).

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

210012211020 is a wasteful number, since it uses less digits than its factorization.

210012211020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632 (or 2391 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210012211020 its reverse (20112210012), we get a palindrome (230124421032).

The spelling of 210012211020 in words is "two hundred ten billion, twelve million, two hundred eleven thousand, twenty".