20212221599 has 2 divisors, whose sum is σ = 20212221600. Its totient is φ = 20212221598.

The previous prime is 20212221559. The next prime is 20212221649. The reversal of 20212221599 is 99512221202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20212221599 - 2²⁴ = 20195444383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20212221539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106110799 + 10106110800.

It is an arithmetic number, because the mean of its divisors is an integer number (10106110800).

Almost surely, 2^20212221599 is an apocalyptic number.

20212221599 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212221599 is an equidigital number, since it uses as much as digits as its factorization.

20212221599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 20212221599 in words is "twenty billion, two hundred twelve million, two hundred twenty-one thousand, five hundred ninety-nine".