223312321020 has 48 divisors (see below), whose sum is σ = 625325789088. Its totient is φ = 59545067520.

The previous prime is 223312320997. The next prime is 223312321021. The reversal of 223312321020 is 20123213322.

It is a happy number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223312321021) 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, 616972 + ... + 909548.

It is an arithmetic number, because the mean of its divisors is an integer number (13027620606).

Almost surely, 2^223312321020 is an apocalyptic number.

223312321020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223312321020 is an abundant number, since it is smaller than the sum of its proper divisors (402013468068).

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

223312321020 is a wasteful number, since it uses less digits than its factorization.

223312321020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305310 (or 305308 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 223312321020 its reverse (20123213322), we get a palindrome (243435534342).

The spelling of 223312321020 in words is "two hundred twenty-three billion, three hundred twelve million, three hundred twenty-one thousand, twenty".