223121022020 has 24 divisors (see below), whose sum is σ = 504596773464. Its totient is φ = 82383146496.

The previous prime is 223121022001. The next prime is 223121022073. The reversal of 223121022020 is 20220121322.

It can be written as a sum of positive squares in 4 ways, for example, as 13003297024 + 210117724996 = 114032^2 + 458386^2 .

It is a super-3 number, since 3×223121022020³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 223121022020.

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, 429078629 + ... + 429079148.

It is an arithmetic number, because the mean of its divisors is an integer number (21024865561).

Almost surely, 2^223121022020 is an apocalyptic number.

223121022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223121022020 is an abundant number, since it is smaller than the sum of its proper divisors (281475751444).

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

223121022020 is a wasteful number, since it uses less digits than its factorization.

223121022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858157799 (or 858157797 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 223121022020 its reverse (20220121322), we get a palindrome (243341143342).

The spelling of 223121022020 in words is "two hundred twenty-three billion, one hundred twenty-one million, twenty-two thousand, twenty".