1131312621355 has 64 divisors (see below), whose sum is σ = 1650862402560. Its totient is φ = 726975627264.

The previous prime is 1131312621289. The next prime is 1131312621359. The reversal of 1131312621355 is 5531262131311.

It is a cyclic number.

It is not a de Polignac number, because 1131312621355 - 2⁷ = 1131312621227 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131312621355.

It is not an unprimeable number, because it can be changed into a prime (1131312621359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180804387 + ... + 180810643.

It is an arithmetic number, because the mean of its divisors is an integer number (25794725040).

Almost surely, 2^{1131312621355} is an apocalyptic number.

1131312621355 is a deficient number, since it is larger than the sum of its proper divisors (519549781205).

1131312621355 is a wasteful number, since it uses less digits than its factorization.

1131312621355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9188.

The product of its digits is 16200, while the sum is 34.

Adding to 1131312621355 its reverse (5531262131311), we get a palindrome (6662574752666).

The spelling of 1131312621355 in words is "one trillion, one hundred thirty-one billion, three hundred twelve million, six hundred twenty-one thousand, three hundred fifty-five".