1222212201210 has 384 divisors, whose sum is σ = 4347151151616. Its totient is φ = 230006200320.

The previous prime is 1222212201101. The next prime is 1222212201293. The reversal of 1222212201210 is 121022122221.

It is a happy number.

1222212201210 is a `hidden beast` number, since 1 + 222 + 212 + 20 + 1 + 210 = 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 (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4646784 + ... + 4902756.

It is an arithmetic number, because the mean of its divisors is an integer number (11320706124).

Almost surely, 2^{1222212201210} is an apocalyptic number.

1222212201210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222212201210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2173575575808).

1222212201210 is an abundant number, since it is smaller than the sum of its proper divisors (3124938950406).

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

1222212201210 is a wasteful number, since it uses less digits than its factorization.

1222212201210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256070 (or 256067 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 1222212201210 its reverse (121022122221), we get a palindrome (1343234323431).

The spelling of 1222212201210 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred one thousand, two hundred ten".