221044120313 has 2 divisors, whose sum is σ = 221044120314. Its totient is φ = 221044120312.

The previous prime is 221044120309. The next prime is 221044120331. The reversal of 221044120313 is 313021440122.

Together with next prime (221044120331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188970175849 + 32073944464 = 434707^2 + 179092^2 .

It is a cyclic number.

It is not a de Polignac number, because 221044120313 - 2² = 221044120309 is a prime.

It is not a weakly prime, because it can be changed into another prime (221044120343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110522060156 + 110522060157.

It is an arithmetic number, because the mean of its divisors is an integer number (110522060157).

Almost surely, 2^221044120313 is an apocalyptic number.

It is an amenable number.

221044120313 is a deficient number, since it is larger than the sum of its proper divisors (1).

221044120313 is an equidigital number, since it uses as much as digits as its factorization.

221044120313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 221044120313 its reverse (313021440122), we get a palindrome (534065560435).

The spelling of 221044120313 in words is "two hundred twenty-one billion, forty-four million, one hundred twenty thousand, three hundred thirteen".