221211299999 has 2 divisors, whose sum is σ = 221211300000. Its totient is φ = 221211299998.

The previous prime is 221211299977. The next prime is 221211300017. The reversal of 221211299999 is 999992112122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221211299999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221211299929) 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, 110605649999 + 110605650000.

It is an arithmetic number, because the mean of its divisors is an integer number (110605650000).

Almost surely, 2^221211299999 is an apocalyptic number.

221211299999 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211299999 is an equidigital number, since it uses as much as digits as its factorization.

221211299999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 56.

The spelling of 221211299999 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred ninety-nine thousand, nine hundred ninety-nine".