221444145113 has 2 divisors, whose sum is σ = 221444145114. Its totient is φ = 221444145112.

The previous prime is 221444145103. The next prime is 221444145137. The reversal of 221444145113 is 311541444122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122799783184 + 98644361929 = 350428^2 + 314077^2 .

It is a cyclic number.

It is not a de Polignac number, because 221444145113 - 2¹⁸ = 221443882969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221444145113.

It is not a weakly prime, because it can be changed into another prime (221444145103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110722072556 + 110722072557.

It is an arithmetic number, because the mean of its divisors is an integer number (110722072557).

Almost surely, 2^221444145113 is an apocalyptic number.

It is an amenable number.

221444145113 is a deficient number, since it is larger than the sum of its proper divisors (1).

221444145113 is an equidigital number, since it uses as much as digits as its factorization.

221444145113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15360, while the sum is 32.

Adding to 221444145113 its reverse (311541444122), we get a palindrome (532985589235).

The spelling of 221444145113 in words is "two hundred twenty-one billion, four hundred forty-four million, one hundred forty-five thousand, one hundred thirteen".