223020213021 has 24 divisors (see below), whose sum is σ = 325486584696. Its totient is φ = 147137126400.

The previous prime is 223020213011. The next prime is 223020213029. The reversal of 223020213021 is 120312020322.

It can be written as a sum of positive squares in 4 ways, for example, as 17914484025 + 205105728996 = 133845^2 + 452886^2 .

It is not a de Polignac number, because 223020213021 - 2²¹ = 223018115869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223020212985 and 223020213003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223020213029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1862661 + ... + 1978773.

It is an arithmetic number, because the mean of its divisors is an integer number (13561941029).

Almost surely, 2^223020213021 is an apocalyptic number.

It is an amenable number.

223020213021 is a deficient number, since it is larger than the sum of its proper divisors (102466371675).

223020213021 is a wasteful number, since it uses less digits than its factorization.

223020213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118333 (or 118330 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 223020213021 its reverse (120312020322), we get a palindrome (343332233343).

The spelling of 223020213021 in words is "two hundred twenty-three billion, twenty million, two hundred thirteen thousand, twenty-one".