211213103220 has 72 divisors (see below), whose sum is σ = 732205428864. Its totient is φ = 48277280448.

The previous prime is 211213103209. The next prime is 211213103243. The reversal of 211213103220 is 22301312112.

211213103220 is a `hidden beast` number, since 2 + 11 + 21 + 310 + 322 + 0 = 666.

It is a super-2 number, since 2×211213103220² (a number of 23 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 211213103193 and 211213103202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83813464 + ... + 83815983.

Almost surely, 2^211213103220 is an apocalyptic number.

211213103220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211213103220 is an abundant number, since it is smaller than the sum of its proper divisors (520992325644).

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

211213103220 is a wasteful number, since it uses less digits than its factorization.

211213103220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167629469 (or 167629464 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 211213103220 its reverse (22301312112), we get a palindrome (233514415332).

The spelling of 211213103220 in words is "two hundred eleven billion, two hundred thirteen million, one hundred three thousand, two hundred twenty".