221321204107 has 2 divisors, whose sum is σ = 221321204108. Its totient is φ = 221321204106.

The previous prime is 221321204101. The next prime is 221321204123. The reversal of 221321204107 is 701402123122.

221321204107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221321204107 is a prime.

It is not a weakly prime, because it can be changed into another prime (221321204101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110660602053 + 110660602054.

It is an arithmetic number, because the mean of its divisors is an integer number (110660602054).

Almost surely, 2^221321204107 is an apocalyptic number.

221321204107 is a deficient number, since it is larger than the sum of its proper divisors (1).

221321204107 is an equidigital number, since it uses as much as digits as its factorization.

221321204107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

Adding to 221321204107 its reverse (701402123122), we get a palindrome (922723327229).

The spelling of 221321204107 in words is "two hundred twenty-one billion, three hundred twenty-one million, two hundred four thousand, one hundred seven".