221220212219 has 2 divisors, whose sum is σ = 221220212220. Its totient is φ = 221220212218.

The previous prime is 221220212201. The next prime is 221220212251. The reversal of 221220212219 is 912212022122.

221220212219 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 221220212219 - 2⁸ = 221220211963 is a prime.

It is a super-2 number, since 2×221220212219² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (221220212119) 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, 110610106109 + 110610106110.

It is an arithmetic number, because the mean of its divisors is an integer number (110610106110).

Almost surely, 2^221220212219 is an apocalyptic number.

221220212219 is a deficient number, since it is larger than the sum of its proper divisors (1).

221220212219 is an equidigital number, since it uses as much as digits as its factorization.

221220212219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 26.

The spelling of 221220212219 in words is "two hundred twenty-one billion, two hundred twenty million, two hundred twelve thousand, two hundred nineteen".