221202011449 has 2 divisors, whose sum is σ = 221202011450. Its totient is φ = 221202011448.

The previous prime is 221202011441. The next prime is 221202011509. The reversal of 221202011449 is 944110202122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140115462400 + 81086549049 = 374320^2 + 284757^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202011449 - 2³ = 221202011441 is a prime.

It is not a weakly prime, because it can be changed into another prime (221202011441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110601005724 + 110601005725.

It is an arithmetic number, because the mean of its divisors is an integer number (110601005725).

Almost surely, 2^221202011449 is an apocalyptic number.

It is an amenable number.

221202011449 is a deficient number, since it is larger than the sum of its proper divisors (1).

221202011449 is an equidigital number, since it uses as much as digits as its factorization.

221202011449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 221202011449 in words is "two hundred twenty-one billion, two hundred two million, eleven thousand, four hundred forty-nine".