221202321084649 has 2 divisors, whose sum is σ = 221202321084650. Its totient is φ = 221202321084648.

The previous prime is 221202321084643. The next prime is 221202321084653. The reversal of 221202321084649 is 946480123202122.

221202321084649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125398003515625 + 95804317569024 = 11198125^2 + 9787968^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202321084649 - 2²³ = 221202312696041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221202321084599 and 221202321084608.

It is not a weakly prime, because it can be changed into another prime (221202321084643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110601160542324 + 110601160542325.

It is an arithmetic number, because the mean of its divisors is an integer number (110601160542325).

Almost surely, 2^{221202321084649} is an apocalyptic number.

It is an amenable number.

221202321084649 is a deficient number, since it is larger than the sum of its proper divisors (1).

221202321084649 is an equidigital number, since it uses as much as digits as its factorization.

221202321084649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 663552, while the sum is 46.

The spelling of 221202321084649 in words is "two hundred twenty-one trillion, two hundred two billion, three hundred twenty-one million, eighty-four thousand, six hundred forty-nine".