221311223099 has 2 divisors, whose sum is σ = 221311223100. Its totient is φ = 221311223098.

The previous prime is 221311223017. The next prime is 221311223137. The reversal of 221311223099 is 990322113122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221311223099 - 2¹⁶ = 221311157563 is a prime.

It is not a weakly prime, because it can be changed into another prime (221311223699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110655611549 + 110655611550.

It is an arithmetic number, because the mean of its divisors is an integer number (110655611550).

Almost surely, 2^221311223099 is an apocalyptic number.

221311223099 is a deficient number, since it is larger than the sum of its proper divisors (1).

221311223099 is an equidigital number, since it uses as much as digits as its factorization.

221311223099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 221311223099 in words is "two hundred twenty-one billion, three hundred eleven million, two hundred twenty-three thousand, ninety-nine".