10397193903821 has 2 divisors, whose sum is σ = 10397193903822. Its totient is φ = 10397193903820.

The previous prime is 10397193903727. The next prime is 10397193903869. The reversal of 10397193903821 is 12830939179301.

10397193903821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10383571746025 + 13622157796 = 3222355^2 + 116714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10397193903821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10397193903871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5198596951910 + 5198596951911.

It is an arithmetic number, because the mean of its divisors is an integer number (5198596951911).

Almost surely, 2^{10397193903821} is an apocalyptic number.

It is an amenable number.

10397193903821 is a deficient number, since it is larger than the sum of its proper divisors (1).

10397193903821 is an equidigital number, since it uses as much as digits as its factorization.

10397193903821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The spelling of 10397193903821 in words is "ten trillion, three hundred ninety-seven billion, one hundred ninety-three million, nine hundred three thousand, eight hundred twenty-one".