211110212220 has 24 divisors (see below), whose sum is σ = 591108594384. Its totient is φ = 56296056576.

The previous prime is 211110212213. The next prime is 211110212237. The reversal of 211110212220 is 22212011112.

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 211110212220.

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, 1759251709 + ... + 1759251828.

It is an arithmetic number, because the mean of its divisors is an integer number (24629524766).

Almost surely, 2^211110212220 is an apocalyptic number.

211110212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211110212220 is an abundant number, since it is smaller than the sum of its proper divisors (379998382164).

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

211110212220 is a wasteful number, since it uses less digits than its factorization.

211110212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518503549 (or 3518503547 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211110212220 its reverse (22212011112), we get a palindrome (233322223332).

The spelling of 211110212220 in words is "two hundred eleven billion, one hundred ten million, two hundred twelve thousand, two hundred twenty".