20212122193 has 2 divisors, whose sum is σ = 20212122194. Its totient is φ = 20212122192.

The previous prime is 20212122173. The next prime is 20212122209. The reversal of 20212122193 is 39122121202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17786756689 + 2425365504 = 133367^2 + 49248^2 .

It is a cyclic number.

It is not a de Polignac number, because 20212122193 - 2¹³ = 20212114001 is a prime.

It is not a weakly prime, because it can be changed into another prime (20212122143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106061096 + 10106061097.

It is an arithmetic number, because the mean of its divisors is an integer number (10106061097).

Almost surely, 2^20212122193 is an apocalyptic number.

It is an amenable number.

20212122193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20212122193 is an equidigital number, since it uses as much as digits as its factorization.

20212122193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 20212122193 its reverse (39122121202), we get a palindrome (59334243395).

The spelling of 20212122193 in words is "twenty billion, two hundred twelve million, one hundred twenty-two thousand, one hundred ninety-three".