1223550400000 has 120 divisors (see below), whose sum is σ = 3055697235360. Its totient is φ = 489419520000.

The previous prime is 1223550399989. The next prime is 1223550400001. The reversal of 1223550400000 is 40553221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223550400001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1217641 + ... + 1982359.

It is an arithmetic number, because the mean of its divisors is an integer number (25464143628).

Almost surely, 2^{1223550400000} is an apocalyptic number.

1223550400000 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 1223550400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1527848617680).

1223550400000 is an abundant number, since it is smaller than the sum of its proper divisors (1832146835360).

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

1223550400000 is an frugal number, since it uses more digits than its factorization.

1223550400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764762 (or 764726 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

Adding to 1223550400000 its reverse (40553221), we get a palindrome (1223590953221).

The spelling of 1223550400000 in words is "one trillion, two hundred twenty-three billion, five hundred fifty million, four hundred thousand".