221223211087 has 2 divisors, whose sum is σ = 221223211088. Its totient is φ = 221223211086.

The previous prime is 221223211051. The next prime is 221223211133. The reversal of 221223211087 is 780112322122.

221223211087 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 221223211087 - 2¹⁹ = 221222686799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221223211387) 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, 110611605543 + 110611605544.

It is an arithmetic number, because the mean of its divisors is an integer number (110611605544).

Almost surely, 2^221223211087 is an apocalyptic number.

221223211087 is a deficient number, since it is larger than the sum of its proper divisors (1).

221223211087 is an equidigital number, since it uses as much as digits as its factorization.

221223211087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 31.

The spelling of 221223211087 in words is "two hundred twenty-one billion, two hundred twenty-three million, two hundred eleven thousand, eighty-seven".