221310020013373 has 2 divisors, whose sum is σ = 221310020013374. Its totient is φ = 221310020013372.

The previous prime is 221310020013371. The next prime is 221310020013413. The reversal of 221310020013373 is 373310020013122.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154241421843609 + 67068598169764 = 12419397^2 + 8189542^2 .

It is a cyclic number.

It is not a de Polignac number, because 221310020013373 - 2¹ = 221310020013371 is a prime.

Together with 221310020013371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221310020013371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655010006686 + 110655010006687.

It is an arithmetic number, because the mean of its divisors is an integer number (110655010006687).

Almost surely, 2^{221310020013373} is an apocalyptic number.

It is an amenable number.

221310020013373 is a deficient number, since it is larger than the sum of its proper divisors (1).

221310020013373 is an equidigital number, since it uses as much as digits as its factorization.

221310020013373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 28.

Adding to 221310020013373 its reverse (373310020013122), we get a palindrome (594620040026495).

The spelling of 221310020013373 in words is "two hundred twenty-one trillion, three hundred ten billion, twenty million, thirteen thousand, three hundred seventy-three".