1231266663113 has 4 divisors (see below), whose sum is σ = 1231269923268. Its totient is φ = 1231263402960.

The previous prime is 1231266663101. The next prime is 1231266663127. The reversal of 1231266663113 is 3113666621321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 585474416569 + 645792246544 = 765163^2 + 803612^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231266663113 - 2¹⁶ = 1231266597577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231266668113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976118 + ... + 1848063.

It is an arithmetic number, because the mean of its divisors is an integer number (307817480817).

Almost surely, 2^{1231266663113} is an apocalyptic number.

It is an amenable number.

1231266663113 is a deficient number, since it is larger than the sum of its proper divisors (3260155).

1231266663113 is an equidigital number, since it uses as much as digits as its factorization.

1231266663113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260154.

The product of its digits is 139968, while the sum is 41.

The spelling of 1231266663113 in words is "one trillion, two hundred thirty-one billion, two hundred sixty-six million, six hundred sixty-three thousand, one hundred thirteen".