221312040233 has 2 divisors, whose sum is σ = 221312040234. Its totient is φ = 221312040232.

The previous prime is 221312040181. The next prime is 221312040239. The reversal of 221312040233 is 332040213122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219311446249 + 2000593984 = 468307^2 + 44728^2 .

It is a cyclic number.

It is not a de Polignac number, because 221312040233 - 2²² = 221307845929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221312040199 and 221312040208.

It is not a weakly prime, because it can be changed into another prime (221312040239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110656020116 + 110656020117.

It is an arithmetic number, because the mean of its divisors is an integer number (110656020117).

Almost surely, 2^221312040233 is an apocalyptic number.

It is an amenable number.

221312040233 is a deficient number, since it is larger than the sum of its proper divisors (1).

221312040233 is an equidigital number, since it uses as much as digits as its factorization.

221312040233 is an odious number, because the sum of its binary digits is odd.

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

Adding to 221312040233 its reverse (332040213122), we get a palindrome (553352253355).

The spelling of 221312040233 in words is "two hundred twenty-one billion, three hundred twelve million, forty thousand, two hundred thirty-three".