1231122530515 has 8 divisors (see below), whose sum is σ = 1477779915888. Its totient is φ = 984609438240.

The previous prime is 1231122530503. The next prime is 1231122530549. The reversal of 1231122530515 is 5150352211321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231122530515 - 2¹⁵ = 1231122497747 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 36054501 + ... + 36088630.

It is an arithmetic number, because the mean of its divisors is an integer number (184722489486).

Almost surely, 2^{1231122530515} is an apocalyptic number.

1231122530515 is a deficient number, since it is larger than the sum of its proper divisors (246657385373).

1231122530515 is an equidigital number, since it uses as much as digits as its factorization.

1231122530515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72146549.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 1231122530515 its reverse (5150352211321), we get a palindrome (6381474741836).

The spelling of 1231122530515 in words is "one trillion, two hundred thirty-one billion, one hundred twenty-two million, five hundred thirty thousand, five hundred fifteen".