72221617099 has 2 divisors, whose sum is σ = 72221617100. Its totient is φ = 72221617098.

The previous prime is 72221617051. The next prime is 72221617103. The reversal of 72221617099 is 99071612227.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72221617099 - 2¹⁷ = 72221486027 is a prime.

It is not a weakly prime, because it can be changed into another prime (72221617049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36110808549 + 36110808550.

It is an arithmetic number, because the mean of its divisors is an integer number (36110808550).

Almost surely, 2^72221617099 is an apocalyptic number.

72221617099 is a deficient number, since it is larger than the sum of its proper divisors (1).

72221617099 is an equidigital number, since it uses as much as digits as its factorization.

72221617099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 72221617099 in words is "seventy-two billion, two hundred twenty-one million, six hundred seventeen thousand, ninety-nine".