1271206661115 has 64 divisors (see below), whose sum is σ = 2110568140800. Its totient is φ = 652874711040.

The previous prime is 1271206661111. The next prime is 1271206661143. The reversal of 1271206661115 is 5111666021721.

It is not a de Polignac number, because 1271206661115 - 2² = 1271206661111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271206661111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58844086 + ... + 58865684.

It is an arithmetic number, because the mean of its divisors is an integer number (32977627200).

Almost surely, 2^{1271206661115} is an apocalyptic number.

1271206661115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1271206661115 is a deficient number, since it is larger than the sum of its proper divisors (839361479685).

1271206661115 is a wasteful number, since it uses less digits than its factorization.

1271206661115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22884.

The product of its (nonzero) digits is 30240, while the sum is 39.

The spelling of 1271206661115 in words is "one trillion, two hundred seventy-one billion, two hundred six million, six hundred sixty-one thousand, one hundred fifteen".