1222012221222 has 64 divisors (see below), whose sum is σ = 2692739073024. Its totient is φ = 367358561280.

The previous prime is 1222012221103. The next prime is 1222012221233. The reversal of 1222012221222 is 2221222102221.

1222012221222 is a modest number, since divided by 12221222 gives 12220 as remainder.

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, 1801398 + ... + 2385174.

It is an arithmetic number, because the mean of its divisors is an integer number (42074048016).

Almost surely, 2^{1222012221222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222012221222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1346369536512).

1222012221222 is an abundant number, since it is smaller than the sum of its proper divisors (1470726851802).

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

1222012221222 is a wasteful number, since it uses less digits than its factorization.

1222012221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 584413.

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

Adding to 1222012221222 its reverse (2221222102221), we get a palindrome (3443234323443).

The spelling of 1222012221222 in words is "one trillion, two hundred twenty-two billion, twelve million, two hundred twenty-one thousand, two hundred twenty-two".