211222101111210 has 192 divisors, whose sum is σ = 665882661600000. Its totient is φ = 45348314351616.

The previous prime is 211222101111199. The next prime is 211222101111221. The reversal of 211222101111210 is 12111101222112.

It is a happy number.

211222101111210 is a `hidden beast` number, since 21 + 1 + 222 + 101 + 111 + 210 = 666.

It is an interprime number because it is at equal distance from previous prime (211222101111199) and next prime (211222101111221).

It is a super-2 number, since 2×211222101111210² (a number of 29 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14417185 + ... + 25105764.

It is an arithmetic number, because the mean of its divisors is an integer number (3468138862500).

Almost surely, 2^{211222101111210} is an apocalyptic number.

211222101111210 is an abundant number, since it is smaller than the sum of its proper divisors (454660560488790).

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

211222101111210 is a wasteful number, since it uses less digits than its factorization.

211222101111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39523485 (or 39523482 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211222101111210 its reverse (12111101222112), we get a palindrome (223333202333322).

The spelling of 211222101111210 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred one million, one hundred eleven thousand, two hundred ten".