1222210221222 has 16 divisors (see below), whose sum is σ = 2454648145920. Its totient is φ = 405698789832.

The previous prime is 1222210221191. The next prime is 1222210221223. The reversal of 1222210221222 is 2221220122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222210221223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426152758 + ... + 426155625.

It is an arithmetic number, because the mean of its divisors is an integer number (153415509120).

Almost surely, 2^{1222210221222} is an apocalyptic number.

1222210221222 is an abundant number, since it is smaller than the sum of its proper divisors (1232437924698).

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

1222210221222 is a wasteful number, since it uses less digits than its factorization.

1222210221222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852308627.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 1222210221222 its reverse (2221220122221), we get a palindrome (3443430343443).

Subtracting 1222210221222 from its reverse (2221220122221), we obtain a palindrome (999009900999).

The spelling of 1222210221222 in words is "one trillion, two hundred twenty-two billion, two hundred ten million, two hundred twenty-one thousand, two hundred twenty-two".