223232213021 has 2 divisors, whose sum is σ = 223232213022. Its totient is φ = 223232213020.

The previous prime is 223232213011. The next prime is 223232213053. The reversal of 223232213021 is 120312232322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215881036900 + 7351176121 = 464630^2 + 85739^2 .

It is a cyclic number.

It is not a de Polignac number, because 223232213021 - 2²⁶ = 223165104157 is a prime.

It is a super-3 number, since 3×223232213021³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223232213011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111616106510 + 111616106511.

It is an arithmetic number, because the mean of its divisors is an integer number (111616106511).

Almost surely, 2^223232213021 is an apocalyptic number.

It is an amenable number.

223232213021 is a deficient number, since it is larger than the sum of its proper divisors (1).

223232213021 is an equidigital number, since it uses as much as digits as its factorization.

223232213021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 223232213021 its reverse (120312232322), we get a palindrome (343544445343).

The spelling of 223232213021 in words is "two hundred twenty-three billion, two hundred thirty-two million, two hundred thirteen thousand, twenty-one".