1051261166243 has 2 divisors, whose sum is σ = 1051261166244. Its totient is φ = 1051261166242.

The previous prime is 1051261166237. The next prime is 1051261166297. The reversal of 1051261166243 is 3426611621501.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1051261166243 is a prime.

It is a super-2 number, since 2×1051261166243² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1051261166197 and 1051261166206.

It is not a weakly prime, because it can be changed into another prime (1051261166233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525630583121 + 525630583122.

It is an arithmetic number, because the mean of its divisors is an integer number (525630583122).

Almost surely, 2^{1051261166243} is an apocalyptic number.

1051261166243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051261166243 is an equidigital number, since it uses as much as digits as its factorization.

1051261166243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

Adding to 1051261166243 its reverse (3426611621501), we get a palindrome (4477872787744).

The spelling of 1051261166243 in words is "one trillion, fifty-one billion, two hundred sixty-one million, one hundred sixty-six thousand, two hundred forty-three".