221240242099 has 2 divisors, whose sum is σ = 221240242100. Its totient is φ = 221240242098.

The previous prime is 221240242033. The next prime is 221240242117. The reversal of 221240242099 is 990242042122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221240242099 - 2⁹ = 221240241587 is a prime.

It is not a weakly prime, because it can be changed into another prime (221240242009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110620121049 + 110620121050.

It is an arithmetic number, because the mean of its divisors is an integer number (110620121050).

Almost surely, 2^221240242099 is an apocalyptic number.

221240242099 is a deficient number, since it is larger than the sum of its proper divisors (1).

221240242099 is an equidigital number, since it uses as much as digits as its factorization.

221240242099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 221240242099 in words is "two hundred twenty-one billion, two hundred forty million, two hundred forty-two thousand, ninety-nine".