212100110121210 has 128 divisors (see below), whose sum is σ = 536377968230400. Its totient is φ = 53528602982400.

The previous prime is 212100110121187. The next prime is 212100110121223. The reversal of 212100110121210 is 12121011001212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 212100110121210.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2242997911 + ... + 2243092469.

It is an arithmetic number, because the mean of its divisors is an integer number (4190452876800).

Almost surely, 2^{212100110121210} is an apocalyptic number.

212100110121210 is an abundant number, since it is smaller than the sum of its proper divisors (324277858109190).

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

212100110121210 is a wasteful number, since it uses less digits than its factorization.

212100110121210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98556.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212100110121210 its reverse (12121011001212), we get a palindrome (224221121122422).

The spelling of 212100110121210 in words is "two hundred twelve trillion, one hundred billion, one hundred ten million, one hundred twenty-one thousand, two hundred ten".