1223404220020 has 24 divisors (see below), whose sum is σ = 2569174675200. Its totient is φ = 489356771232.

The previous prime is 1223404219937. The next prime is 1223404220047. The reversal of 1223404220020 is 200224043221.

It is a junction number, because it is equal to n+sod(n) for n = 1223404219973 and 1223404220000.

It is a congruent number.

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, 2253541 + ... + 2743219.

It is an arithmetic number, because the mean of its divisors is an integer number (107048944800).

Almost surely, 2^{1223404220020} is an apocalyptic number.

1223404220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223404220020 is an abundant number, since it is smaller than the sum of its proper divisors (1345770455180).

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

1223404220020 is a wasteful number, since it uses less digits than its factorization.

1223404220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614607 (or 614605 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 1223404220020 its reverse (200224043221), we get a palindrome (1423628263241).

The spelling of 1223404220020 in words is "one trillion, two hundred twenty-three billion, four hundred four million, two hundred twenty thousand, twenty".