221002049 has 2 divisors, whose sum is σ = 221002050. Its totient is φ = 221002048.

The previous prime is 221002043. The next prime is 221002051. The reversal of 221002049 is 940200122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219484225 + 1517824 = 14815^2 + 1232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221002049 is a prime.

It is a Sophie Germain prime.

Together with 221002051, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 221002049.

It is not a weakly prime, because it can be changed into another prime (221002043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110501024 + 110501025.

It is an arithmetic number, because the mean of its divisors is an integer number (110501025).

Almost surely, 2^221002049 is an apocalyptic number.

It is an amenable number.

221002049 is a deficient number, since it is larger than the sum of its proper divisors (1).

221002049 is an equidigital number, since it uses as much as digits as its factorization.

221002049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 221002049 is about 14866.1376624865. The cubic root of 221002049 is about 604.5962280930.

The spelling of 221002049 in words is "two hundred twenty-one million, two thousand, forty-nine".