211210012220 has 24 divisors (see below), whose sum is σ = 443616717600. Its totient is φ = 84469587392.

The previous prime is 211210012213. The next prime is 211210012241. The reversal of 211210012220 is 22210012112.

It is a junction number, because it is equal to n+sod(n) for n = 211210012195 and 211210012204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780575 + ... + 1015734.

It is an arithmetic number, because the mean of its divisors is an integer number (18484029900).

Almost surely, 2^211210012220 is an apocalyptic number.

211210012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211210012220 is an abundant number, since it is smaller than the sum of its proper divisors (232406705380).

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

211210012220 is a wasteful number, since it uses less digits than its factorization.

211210012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802197 (or 1802195 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 211210012220 its reverse (22210012112), we get a palindrome (233420024332).

The spelling of 211210012220 in words is "two hundred eleven billion, two hundred ten million, twelve thousand, two hundred twenty".