222111212001210 has 192 divisors, whose sum is σ = 684554778835200. Its totient is φ = 50759139151872.

The previous prime is 222111212001197. The next prime is 222111212001253. The reversal of 222111212001210 is 12100212111222.

222111212001210 is a `hidden beast` number, since 2 + 221 + 1 + 121 + 200 + 121 + 0 = 666.

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

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 95 ways as a sum of consecutive naturals, for example, 93556336 + ... + 95901044.

It is an arithmetic number, because the mean of its divisors is an integer number (3565389473100).

Almost surely, 2^{222111212001210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222111212001210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342277389417600).

222111212001210 is an abundant number, since it is smaller than the sum of its proper divisors (462443566833990).

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

222111212001210 is a wasteful number, since it uses less digits than its factorization.

222111212001210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2350307 (or 2350295 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 222111212001210 its reverse (12100212111222), we get a palindrome (234211424112432).

The spelling of 222111212001210 in words is "two hundred twenty-two trillion, one hundred eleven billion, two hundred twelve million, one thousand, two hundred ten".