1222213323220 has 24 divisors (see below), whose sum is σ = 2615075301384. Its totient is φ = 479661077376.

The previous prime is 1222213323187. The next prime is 1222213323259. The reversal of 1222213323220 is 223233122221.

It can be written as a sum of positive squares in 4 ways, for example, as 77407481284 + 1144805841936 = 278222^2 + 1069956^2 .

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 576514659 + ... + 576516778.

It is an arithmetic number, because the mean of its divisors is an integer number (108961470891).

Almost surely, 2^{1222213323220} is an apocalyptic number.

1222213323220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222213323220 is an abundant number, since it is smaller than the sum of its proper divisors (1392861978164).

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

1222213323220 is a wasteful number, since it uses less digits than its factorization.

1222213323220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153031499 (or 1153031497 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 1222213323220 its reverse (223233122221), we get a palindrome (1445446445441).

The spelling of 1222213323220 in words is "one trillion, two hundred twenty-two billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred twenty".