1051873820891 has 2 divisors, whose sum is σ = 1051873820892. Its totient is φ = 1051873820890.

The previous prime is 1051873820843. The next prime is 1051873820911. The reversal of 1051873820891 is 1980283781501.

It is a strong prime.

It is an emirp because it is prime and its reverse (1980283781501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1051873820891 - 2³⁰ = 1050800079067 is a prime.

It is a super-2 number, since 2×1051873820891² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1051873820801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525936910445 + 525936910446.

It is an arithmetic number, because the mean of its divisors is an integer number (525936910446).

Almost surely, 2^{1051873820891} is an apocalyptic number.

1051873820891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051873820891 is an equidigital number, since it uses as much as digits as its factorization.

1051873820891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 53.

The spelling of 1051873820891 in words is "one trillion, fifty-one billion, eight hundred seventy-three million, eight hundred twenty thousand, eight hundred ninety-one".