1211354464875 has 16 divisors (see below), whose sum is σ = 2015693830176. Its totient is φ = 646055714400.

The previous prime is 1211354464811. The next prime is 1211354464883. The reversal of 1211354464875 is 5784644531121.

It is a happy number.

It is not a de Polignac number, because 1211354464875 - 2⁶ = 1211354464811 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1615138912 + ... + 1615139661.

It is an arithmetic number, because the mean of its divisors is an integer number (125980864386).

Almost surely, 2^{1211354464875} is an apocalyptic number.

1211354464875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1211354464875 is a deficient number, since it is larger than the sum of its proper divisors (804339365301).

1211354464875 is an equidigital number, since it uses as much as digits as its factorization.

1211354464875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230278591 (or 3230278581 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 51.

Adding to 1211354464875 its reverse (5784644531121), we get a palindrome (6995998995996).

The spelling of 1211354464875 in words is "one trillion, two hundred eleven billion, three hundred fifty-four million, four hundred sixty-four thousand, eight hundred seventy-five".