221211133499 has 2 divisors, whose sum is σ = 221211133500. Its totient is φ = 221211133498.

The previous prime is 221211133399. The next prime is 221211133501. The reversal of 221211133499 is 994331112122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211133499 - 2⁸ = 221211133243 is a prime.

It is a Sophie Germain prime.

Together with 221211133501, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221211133399) 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 as a sum of consecutive naturals, namely, 110605566749 + 110605566750.

It is an arithmetic number, because the mean of its divisors is an integer number (110605566750).

Almost surely, 2^221211133499 is an apocalyptic number.

221211133499 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211133499 is an equidigital number, since it uses as much as digits as its factorization.

221211133499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The spelling of 221211133499 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred thirty-three thousand, four hundred ninety-nine".