221211111499 has 8 divisors (see below), whose sum is σ = 263804555520. Its totient is φ = 181365631656.

The previous prime is 221211111487. The next prime is 221211111553. The reversal of 221211111499 is 994111112122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221211111499 - 2⁵ = 221211111467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221211111439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686990869 + ... + 686991190.

It is an arithmetic number, because the mean of its divisors is an integer number (32975569440).

Almost surely, 2^221211111499 is an apocalyptic number.

221211111499 is a deficient number, since it is larger than the sum of its proper divisors (42593444021).

221211111499 is a wasteful number, since it uses less digits than its factorization.

221211111499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1373982089.

The product of its digits is 2592, while the sum is 34.

The spelling of 221211111499 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, four hundred ninety-nine".