1222211401440 has 384 divisors, whose sum is σ = 4287374364672. Its totient is φ = 291251650560.

The previous prime is 1222211401429. The next prime is 1222211401451. The reversal of 1222211401440 is 441041122221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1222211401429) and next prime (1222211401451).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1222211401440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13361299 + ... + 13452461.

It is an arithmetic number, because the mean of its divisors is an integer number (11165037408).

Almost surely, 2^{1222211401440} is an apocalyptic number.

1222211401440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222211401440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2143687182336).

1222211401440 is an abundant number, since it is smaller than the sum of its proper divisors (3065162963232).

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

1222211401440 is a wasteful number, since it uses less digits than its factorization.

1222211401440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91282 (or 91274 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 1222211401440 its reverse (441041122221), we get a palindrome (1663252523661).

The spelling of 1222211401440 in words is "one trillion, two hundred twenty-two billion, two hundred eleven million, four hundred one thousand, four hundred forty".