221121140235533 has 2 divisors, whose sum is σ = 221121140235534. Its totient is φ = 221121140235532.

The previous prime is 221121140235511. The next prime is 221121140235539. The reversal of 221121140235533 is 335532041121122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 203875076781289 + 17246063454244 = 14278483^2 + 4152838^2 .

It is a cyclic number.

It is not a de Polignac number, because 221121140235533 - 2⁶ = 221121140235469 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221121140235493 and 221121140235502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221121140235539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110560570117766 + 110560570117767.

It is an arithmetic number, because the mean of its divisors is an integer number (110560570117767).

Almost surely, 2^{221121140235533} is an apocalyptic number.

It is an amenable number.

221121140235533 is a deficient number, since it is larger than the sum of its proper divisors (1).

221121140235533 is an equidigital number, since it uses as much as digits as its factorization.

221121140235533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 221121140235533 its reverse (335532041121122), we get a palindrome (556653181356655).

The spelling of 221121140235533 in words is "two hundred twenty-one trillion, one hundred twenty-one billion, one hundred forty million, two hundred thirty-five thousand, five hundred thirty-three".