20012121232193 has 2 divisors, whose sum is σ = 20012121232194. Its totient is φ = 20012121232192.

The previous prime is 20012121232177. The next prime is 20012121232223. The reversal of 20012121232193 is 39123212121002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19957555542544 + 54565689649 = 4467388^2 + 233593^2 .

It is a cyclic number.

It is not a de Polignac number, because 20012121232193 - 2⁴ = 20012121232177 is a prime.

It is not a weakly prime, because it can be changed into another prime (20012121232153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006060616096 + 10006060616097.

It is an arithmetic number, because the mean of its divisors is an integer number (10006060616097).

Almost surely, 2^{20012121232193} is an apocalyptic number.

It is an amenable number.

20012121232193 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012121232193 is an equidigital number, since it uses as much as digits as its factorization.

20012121232193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 20012121232193 its reverse (39123212121002), we get a palindrome (59135333353195).

The spelling of 20012121232193 in words is "twenty trillion, twelve billion, one hundred twenty-one million, two hundred thirty-two thousand, one hundred ninety-three".