211212221110 has 64 divisors (see below), whose sum is σ = 440895571200. Its totient is φ = 72041616000.

The previous prime is 211212221071. The next prime is 211212221111. The reversal of 211212221110 is 11122212112.

211212221110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×211212221110² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211212221111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 289200 + ... + 711379.

It is an arithmetic number, because the mean of its divisors is an integer number (6888993300).

Almost surely, 2^211212221110 is an apocalyptic number.

211212221110 is an abundant number, since it is smaller than the sum of its proper divisors (229683350090).

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

211212221110 is a wasteful number, since it uses less digits than its factorization.

211212221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000717.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211212221110 its reverse (11122212112), we get a palindrome (222334433222).

The spelling of 211212221110 in words is "two hundred eleven billion, two hundred twelve million, two hundred twenty-one thousand, one hundred ten".