211220222111210 has 64 divisors (see below), whose sum is σ = 413694387445248. Its totient is φ = 77180093685504.

The previous prime is 211220222111191. The next prime is 211220222111231. The reversal of 211220222111210 is 12111222022112.

It is a super-2 number, since 2×211220222111210² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14708459 + ... + 25274081.

It is an arithmetic number, because the mean of its divisors is an integer number (6463974803832).

Almost surely, 2^{211220222111210} is an apocalyptic number.

211220222111210 is a deficient number, since it is larger than the sum of its proper divisors (202474165334038).

211220222111210 is a wasteful number, since it uses less digits than its factorization.

211220222111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10567239.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211220222111210 its reverse (12111222022112), we get a palindrome (223331444133322).

It can be divided in two parts, 21122022 and 2111210, that added together give a palindrome (23233232).

The spelling of 211220222111210 in words is "two hundred eleven trillion, two hundred twenty billion, two hundred twenty-two million, one hundred eleven thousand, two hundred ten".