221122949 has 2 divisors, whose sum is σ = 221122950. Its totient is φ = 221122948.

The previous prime is 221122933. The next prime is 221122991. The reversal of 221122949 is 949221122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130530625 + 90592324 = 11425^2 + 9518^2 .

It is a cyclic number.

It is not a de Polignac number, because 221122949 - 2⁴ = 221122933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221122049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110561474 + 110561475.

It is an arithmetic number, because the mean of its divisors is an integer number (110561475).

Almost surely, 2^221122949 is an apocalyptic number.

It is an amenable number.

221122949 is a deficient number, since it is larger than the sum of its proper divisors (1).

221122949 is an equidigital number, since it uses as much as digits as its factorization.

221122949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 32.

The square root of 221122949 is about 14870.2033947085. The cubic root of 221122949 is about 604.7064568733.

The spelling of 221122949 in words is "two hundred twenty-one million, one hundred twenty-two thousand, nine hundred forty-nine".