1243322222440 has 32 divisors (see below), whose sum is σ = 2962032355080. Its totient is φ = 468074248192.

The previous prime is 1243322222399. The next prime is 1243322222501. The reversal of 1243322222440 is 442222233421.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1243167020676 + 155201764 = 1114974^2 + 12458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 914206837 + ... + 914208196.

Almost surely, 2^{1243322222440} is an apocalyptic number.

1243322222440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243322222440 is an abundant number, since it is smaller than the sum of its proper divisors (1718710132640).

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

1243322222440 is a wasteful number, since it uses less digits than its factorization.

1243322222440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828415061 (or 1828415057 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 31.

Adding to 1243322222440 its reverse (442222233421), we get a palindrome (1685544455861).

The spelling of 1243322222440 in words is "one trillion, two hundred forty-three billion, three hundred twenty-two million, two hundred twenty-two thousand, four hundred forty".