10003031891261 has 2 divisors, whose sum is σ = 10003031891262. Its totient is φ = 10003031891260.

The previous prime is 10003031891257. The next prime is 10003031891299. The reversal of 10003031891261 is 16219813030001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8166277828900 + 1836754062361 = 2857670^2 + 1355269^2 .

It is a cyclic number.

It is not a de Polignac number, because 10003031891261 - 2² = 10003031891257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10003031891161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5001515945630 + 5001515945631.

It is an arithmetic number, because the mean of its divisors is an integer number (5001515945631).

Almost surely, 2^{10003031891261} is an apocalyptic number.

It is an amenable number.

10003031891261 is a deficient number, since it is larger than the sum of its proper divisors (1).

10003031891261 is an equidigital number, since it uses as much as digits as its factorization.

10003031891261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The spelling of 10003031891261 in words is "ten trillion, three billion, thirty-one million, eight hundred ninety-one thousand, two hundred sixty-one".