221904242426899 has 2 divisors, whose sum is σ = 221904242426900. Its totient is φ = 221904242426898.

The previous prime is 221904242426773. The next prime is 221904242426903. The reversal of 221904242426899 is 998624242409122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221904242426899 - 2¹³ = 221904242418707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221904242426899.

It is not a weakly prime, because it can be changed into another prime (221904242421899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110952121213449 + 110952121213450.

It is an arithmetic number, because the mean of its divisors is an integer number (110952121213450).

Almost surely, 2^{221904242426899} is an apocalyptic number.

221904242426899 is a deficient number, since it is larger than the sum of its proper divisors (1).

221904242426899 is an equidigital number, since it uses as much as digits as its factorization.

221904242426899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71663616, while the sum is 64.

The spelling of 221904242426899 in words is "two hundred twenty-one trillion, nine hundred four billion, two hundred forty-two million, four hundred twenty-six thousand, eight hundred ninety-nine".