1222221201222 has 64 divisors (see below), whose sum is σ = 2906473365504. Its totient is φ = 335280345120.

The previous prime is 1222221201199. The next prime is 1222221201251. The reversal of 1222221201222 is 2221021222221.

It is a super-2 number, since 2×1222221201222² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3530418 + ... + 3861125.

It is an arithmetic number, because the mean of its divisors is an integer number (45413646336).

Almost surely, 2^{1222221201222} is an apocalyptic number.

1222221201222 is an abundant number, since it is smaller than the sum of its proper divisors (1684252164282).

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

1222221201222 is a wasteful number, since it uses less digits than its factorization.

1222221201222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7391713.

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

Adding to 1222221201222 its reverse (2221021222221), we get a palindrome (3443242423443).

The spelling of 1222221201222 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred one thousand, two hundred twenty-two".