223121020 has 12 divisors (see below), whose sum is σ = 468554184. Its totient is φ = 89248400.

The previous prime is 223121011. The next prime is 223121027. The reversal of 223121020 is 20121322.

It is a super-3 number, since 3×223121020³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5578006 + ... + 5578045.

It is an arithmetic number, because the mean of its divisors is an integer number (39046182).

Almost surely, 2^223121020 is an apocalyptic number.

223121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

223121020 is an abundant number, since it is smaller than the sum of its proper divisors (245433164).

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

223121020 is a wasteful number, since it uses less digits than its factorization.

223121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11156060 (or 11156058 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 223121020 is about 14937.2360227721. The cubic root of 223121020 is about 606.5223777664.

Adding to 223121020 its reverse (20121322), we get a palindrome (243242342).

It can be divided in two parts, 22312 and 1020, that added together give a palindrome (23332).

The spelling of 223121020 in words is "two hundred twenty-three million, one hundred twenty-one thousand, twenty".