221021013107 has 2 divisors, whose sum is σ = 221021013108. Its totient is φ = 221021013106.

The previous prime is 221021013067. The next prime is 221021013211. The reversal of 221021013107 is 701310120122.

221021013107 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 not a de Polignac number, because 221021013107 - 2¹⁸ = 221020750963 is a prime.

It is not a weakly prime, because it can be changed into another prime (221021013407) 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, 110510506553 + 110510506554.

It is an arithmetic number, because the mean of its divisors is an integer number (110510506554).

Almost surely, 2^221021013107 is an apocalyptic number.

221021013107 is a deficient number, since it is larger than the sum of its proper divisors (1).

221021013107 is an equidigital number, since it uses as much as digits as its factorization.

221021013107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 20.

Adding to 221021013107 its reverse (701310120122), we get a palindrome (922331133229).

The spelling of 221021013107 in words is "two hundred twenty-one billion, twenty-one million, thirteen thousand, one hundred seven".