1232223521 has 2 divisors, whose sum is σ = 1232223522. Its totient is φ = 1232223520.

The previous prime is 1232223493. The next prime is 1232223539. The reversal of 1232223521 is 1253222321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 902401600 + 329821921 = 30040^2 + 18161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232223521 - 2⁶ = 1232223457 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232223221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616111760 + 616111761.

It is an arithmetic number, because the mean of its divisors is an integer number (616111761).

Almost surely, 2^1232223521 is an apocalyptic number.

It is an amenable number.

1232223521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232223521 is an equidigital number, since it uses as much as digits as its factorization.

1232223521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 1232223521 is about 35103.0414779119. The cubic root of 1232223521 is about 1072.0865103501.

Adding to 1232223521 its reverse (1253222321), we get a palindrome (2485445842).

The spelling of 1232223521 in words is "one billion, two hundred thirty-two million, two hundred twenty-three thousand, five hundred twenty-one".