221211111011219 has 4 divisors (see below), whose sum is σ = 252812698298544. Its totient is φ = 189609523723896.

The previous prime is 221211111011201. The next prime is 221211111011249. The reversal of 221211111011219 is 912110111112122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221211111011219 - 2¹² = 221211111007123 is a prime.

It is a super-2 number, since 2×221211111011219² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211111011249) 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 in 3 ways as a sum of consecutive naturals, for example, 15800793643652 + ... + 15800793643665.

It is an arithmetic number, because the mean of its divisors is an integer number (63203174574636).

Almost surely, 2^{221211111011219} is an apocalyptic number.

221211111011219 is a deficient number, since it is larger than the sum of its proper divisors (31601587287325).

221211111011219 is an equidigital number, since it uses as much as digits as its factorization.

221211111011219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31601587287324.

The product of its (nonzero) digits is 144, while the sum is 26.

The spelling of 221211111011219 in words is "two hundred twenty-one trillion, two hundred eleven billion, one hundred eleven million, eleven thousand, two hundred nineteen".