1223553234220 has 48 divisors (see below), whose sum is σ = 2735637716448. Its totient is φ = 458086855680.

The previous prime is 1223553234209. The next prime is 1223553234227. The reversal of 1223553234220 is 224323553221.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (1223553234227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9879582 + ... + 10002661.

It is an arithmetic number, because the mean of its divisors is an integer number (56992452426).

Almost surely, 2^{1223553234220} is an apocalyptic number.

1223553234220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223553234220 is an abundant number, since it is smaller than the sum of its proper divisors (1512084482228).

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

1223553234220 is a wasteful number, since it uses less digits than its factorization.

1223553234220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19882450 (or 19882448 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 1223553234220 its reverse (224323553221), we get a palindrome (1447876787441).

The spelling of 1223553234220 in words is "one trillion, two hundred twenty-three billion, five hundred fifty-three million, two hundred thirty-four thousand, two hundred twenty".