1223243241220 has 288 divisors, whose sum is σ = 3545422223616. Its totient is φ = 348453504000.

The previous prime is 1223243241211. The next prime is 1223243241331. The reversal of 1223243241220 is 221423423221.

It is a super-2 number, since 2×1223243241220² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14110929 + ... + 14197351.

It is an arithmetic number, because the mean of its divisors is an integer number (12310493832).

Almost surely, 2^{1223243241220} is an apocalyptic number.

1223243241220 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 1223243241220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1772711111808).

1223243241220 is an abundant number, since it is smaller than the sum of its proper divisors (2322178982396).

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

1223243241220 is a wasteful number, since it uses less digits than its factorization.

1223243241220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86571 (or 86562 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 1223243241220 its reverse (221423423221), we get a palindrome (1444666664441).

The spelling of 1223243241220 in words is "one trillion, two hundred twenty-three billion, two hundred forty-three million, two hundred forty-one thousand, two hundred twenty".