221332009973 has 2 divisors, whose sum is σ = 221332009974. Its totient is φ = 221332009972.

The previous prime is 221332009903. The next prime is 221332009993. The reversal of 221332009973 is 379900233122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 188375964529 + 32956045444 = 434023^2 + 181538^2 .

It is a cyclic number.

It is not a de Polignac number, because 221332009973 - 2¹² = 221332005877 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221332009973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221332009903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110666004986 + 110666004987.

It is an arithmetic number, because the mean of its divisors is an integer number (110666004987).

Almost surely, 2^221332009973 is an apocalyptic number.

It is an amenable number.

221332009973 is a deficient number, since it is larger than the sum of its proper divisors (1).

221332009973 is an equidigital number, since it uses as much as digits as its factorization.

221332009973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 41.

The spelling of 221332009973 in words is "two hundred twenty-one billion, three hundred thirty-two million, nine thousand, nine hundred seventy-three".