2012121021193 has 2 divisors, whose sum is σ = 2012121021194. Its totient is φ = 2012121021192.

The previous prime is 2012121021187. The next prime is 2012121021217. The reversal of 2012121021193 is 3911201212102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1047241129104 + 964879892089 = 1023348^2 + 982283^2 .

It is a cyclic number.

It is not a de Polignac number, because 2012121021193 - 2⁹ = 2012121020681 is a prime.

It is a super-2 number, since 2×2012121021193² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2012121021133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1006060510596 + 1006060510597.

It is an arithmetic number, because the mean of its divisors is an integer number (1006060510597).

Almost surely, 2^{2012121021193} is an apocalyptic number.

It is an amenable number.

2012121021193 is a deficient number, since it is larger than the sum of its proper divisors (1).

2012121021193 is an equidigital number, since it uses as much as digits as its factorization.

2012121021193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 2012121021193 its reverse (3911201212102), we get a palindrome (5923322233295).

The spelling of 2012121021193 in words is "two trillion, twelve billion, one hundred twenty-one million, twenty-one thousand, one hundred ninety-three".