221110110220949 has 2 divisors, whose sum is σ = 221110110220950. Its totient is φ = 221110110220948.

The previous prime is 221110110220877. The next prime is 221110110221053. The reversal of 221110110220949 is 949022011011122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139966172332900 + 81143937888049 = 11830730^2 + 9007993^2 .

It is a cyclic number.

It is not a de Polignac number, because 221110110220949 - 2¹⁶ = 221110110155413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221170110220949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555055110474 + 110555055110475.

It is an arithmetic number, because the mean of its divisors is an integer number (110555055110475).

Almost surely, 2^{221110110220949} is an apocalyptic number.

It is an amenable number.

221110110220949 is a deficient number, since it is larger than the sum of its proper divisors (1).

221110110220949 is an equidigital number, since it uses as much as digits as its factorization.

221110110220949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 35.

The spelling of 221110110220949 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred ten million, two hundred twenty thousand, nine hundred forty-nine".