1891310013211 has 2 divisors, whose sum is σ = 1891310013212. Its totient is φ = 1891310013210.

The previous prime is 1891310013167. The next prime is 1891310013253. The reversal of 1891310013211 is 1123100131981.

It is a strong prime.

It is an emirp because it is prime and its reverse (1123100131981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1891310013211 - 2¹¹ = 1891310011163 is a prime.

It is not a weakly prime, because it can be changed into another prime (1891310013311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 945655006605 + 945655006606.

It is an arithmetic number, because the mean of its divisors is an integer number (945655006606).

Almost surely, 2^{1891310013211} is an apocalyptic number.

1891310013211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1891310013211 is an equidigital number, since it uses as much as digits as its factorization.

1891310013211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 31.

The spelling of 1891310013211 in words is "one trillion, eight hundred ninety-one billion, three hundred ten million, thirteen thousand, two hundred eleven".