391001220102043 has 2 divisors, whose sum is σ = 391001220102044. Its totient is φ = 391001220102042.

The previous prime is 391001220102013. The next prime is 391001220102167. The reversal of 391001220102043 is 340201022100193.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 391001220102043 - 2⁴¹ = 388802196846491 is a prime.

It is not a weakly prime, because it can be changed into another prime (391001220102013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195500610051021 + 195500610051022.

It is an arithmetic number, because the mean of its divisors is an integer number (195500610051022).

Almost surely, 2^{391001220102043} is an apocalyptic number.

391001220102043 is a deficient number, since it is larger than the sum of its proper divisors (1).

391001220102043 is an equidigital number, since it uses as much as digits as its factorization.

391001220102043 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 28.

The spelling of 391001220102043 in words is "three hundred ninety-one trillion, one billion, two hundred twenty million, one hundred two thousand, forty-three".