219326850121 has 2 divisors, whose sum is σ = 219326850122. Its totient is φ = 219326850120.

The previous prime is 219326850109. The next prime is 219326850131. The reversal of 219326850121 is 121058623912.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209247694096 + 10079156025 = 457436^2 + 100395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219326850121 is a prime.

It is not a weakly prime, because it can be changed into another prime (219326850131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109663425060 + 109663425061.

It is an arithmetic number, because the mean of its divisors is an integer number (109663425061).

Almost surely, 2^219326850121 is an apocalyptic number.

It is an amenable number.

219326850121 is a deficient number, since it is larger than the sum of its proper divisors (1).

219326850121 is an equidigital number, since it uses as much as digits as its factorization.

219326850121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 219326850121 in words is "two hundred nineteen billion, three hundred twenty-six million, eight hundred fifty thousand, one hundred twenty-one".