1223103443440 has 40 divisors (see below), whose sum is σ = 2904220100160. Its totient is φ = 478831984896.

The previous prime is 1223103443411. The next prime is 1223103443447. The reversal of 1223103443440 is 443443013221.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223103443447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162642975 + ... + 162650494.

It is an arithmetic number, because the mean of its divisors is an integer number (72605502504).

Almost surely, 2^{1223103443440} is an apocalyptic number.

1223103443440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223103443440 is an abundant number, since it is smaller than the sum of its proper divisors (1681116656720).

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

1223103443440 is a wasteful number, since it uses less digits than its factorization.

1223103443440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325293529 (or 325293523 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 1223103443440 its reverse (443443013221), we get a palindrome (1666546456661).

The spelling of 1223103443440 in words is "one trillion, two hundred twenty-three billion, one hundred three million, four hundred forty-three thousand, four hundred forty".