221020000099 has 2 divisors, whose sum is σ = 221020000100. Its totient is φ = 221020000098.

The previous prime is 221020000087. The next prime is 221020000127. The reversal of 221020000099 is 990000020122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221020000099 - 2²⁹ = 220483129187 is a prime.

It is not a weakly prime, because it can be changed into another prime (221020000079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110510000049 + 110510000050.

It is an arithmetic number, because the mean of its divisors is an integer number (110510000050).

Almost surely, 2^221020000099 is an apocalyptic number.

221020000099 is a deficient number, since it is larger than the sum of its proper divisors (1).

221020000099 is an equidigital number, since it uses as much as digits as its factorization.

221020000099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 221020000099 in words is "two hundred twenty-one billion, twenty million, ninety-nine", and thus it is an aban number.