223123202221 has 2 divisors, whose sum is σ = 223123202222. Its totient is φ = 223123202220.

The previous prime is 223123202179. The next prime is 223123202257. The reversal of 223123202221 is 122202321322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221971957321 + 1151244900 = 471139^2 + 33930^2 .

It is a cyclic number.

It is not a de Polignac number, because 223123202221 - 2⁹ = 223123201709 is a prime.

It is a super-3 number, since 3×223123202221³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223123202192 and 223123202201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223123202261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111561601110 + 111561601111.

It is an arithmetic number, because the mean of its divisors is an integer number (111561601111).

Almost surely, 2^223123202221 is an apocalyptic number.

It is an amenable number.

223123202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223123202221 is an equidigital number, since it uses as much as digits as its factorization.

223123202221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 223123202221 its reverse (122202321322), we get a palindrome (345325523543).

The spelling of 223123202221 in words is "two hundred twenty-three billion, one hundred twenty-three million, two hundred two thousand, two hundred twenty-one".