1121787313447 has 2 divisors, whose sum is σ = 1121787313448. Its totient is φ = 1121787313446.

The previous prime is 1121787313429. The next prime is 1121787313489. The reversal of 1121787313447 is 7443137871211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121787313447 - 2³¹ = 1119639829799 is a prime.

It is a super-2 number, since 2×1121787313447² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1121787313447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121788313447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560893656723 + 560893656724.

It is an arithmetic number, because the mean of its divisors is an integer number (560893656724).

Almost surely, 2^{1121787313447} is an apocalyptic number.

1121787313447 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121787313447 is an equidigital number, since it uses as much as digits as its factorization.

1121787313447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 790272, while the sum is 49.

It can be divided in two parts, 112178 and 7313447, that added together give a square (7425625 = 2725²).

The spelling of 1121787313447 in words is "one trillion, one hundred twenty-one billion, seven hundred eighty-seven million, three hundred thirteen thousand, four hundred forty-seven".