212101201122210 has 24 divisors (see below), whose sum is σ = 551463122917980. Its totient is φ = 56560320299232.

The previous prime is 212101201122149. The next prime is 212101201122229. The reversal of 212101201122210 is 12221102101212.

212101201122210 is a `hidden beast` number, since 2 + 1 + 210 + 120 + 1 + 122 + 210 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 200913360220881 + 11187840901329 = 14174391^2 + 3344823^2 .

It is a super-3 number, since 3×212101201122210³ (a number of 44 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1178340006145 + ... + 1178340006324.

Almost surely, 2^{212101201122210} is an apocalyptic number.

212101201122210 is an abundant number, since it is smaller than the sum of its proper divisors (339361921795770).

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

212101201122210 is a wasteful number, since it uses less digits than its factorization.

212101201122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356680012482 (or 2356680012479 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212101201122210 its reverse (12221102101212), we get a palindrome (224322303223422).

The spelling of 212101201122210 in words is "two hundred twelve trillion, one hundred one billion, two hundred one million, one hundred twenty-two thousand, two hundred ten".