1311241465555 has 32 divisors (see below), whose sum is σ = 1904140362240. Its totient is φ = 846208581120.

The previous prime is 1311241465531. The next prime is 1311241465559. The reversal of 1311241465555 is 5555641421131.

It is not a de Polignac number, because 1311241465555 - 2¹³ = 1311241457363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311241465559) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20084956 + ... + 20150134.

It is an arithmetic number, because the mean of its divisors is an integer number (59504386320).

Almost surely, 2^{1311241465555} is an apocalyptic number.

1311241465555 is a deficient number, since it is larger than the sum of its proper divisors (592898896685).

1311241465555 is a wasteful number, since it uses less digits than its factorization.

1311241465555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99019.

The product of its digits is 360000, while the sum is 43.

Adding to 1311241465555 its reverse (5555641421131), we get a palindrome (6866882886686).

The spelling of 1311241465555 in words is "one trillion, three hundred eleven billion, two hundred forty-one million, four hundred sixty-five thousand, five hundred fifty-five".