1217143791125 has 36 divisors (see below), whose sum is σ = 1535755824876. Its totient is φ = 963087520000.

The previous prime is 1217143791023. The next prime is 1217143791131. The reversal of 1217143791125 is 5211973417121.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 18 ways, for example, as 90469811524 + 1126673979601 = 300782^2 + 1061449^2 .

It is not a de Polignac number, because 1217143791125 - 2⁸ = 1217143790869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1245796637 + ... + 1245797613.

Almost surely, 2^{1217143791125} is an apocalyptic number.

It is an amenable number.

1217143791125 is a deficient number, since it is larger than the sum of its proper divisors (318612033751).

1217143791125 is an frugal number, since it uses more digits than its factorization.

1217143791125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171 (or 1083 counting only the distinct ones).

The product of its digits is 105840, while the sum is 44.

The spelling of 1217143791125 in words is "one trillion, two hundred seventeen billion, one hundred forty-three million, seven hundred ninety-one thousand, one hundred twenty-five".