1121255344521 has 24 divisors (see below), whose sum is σ = 1798726529760. Its totient is φ = 690003286128.

The previous prime is 1121255344511. The next prime is 1121255344549. The reversal of 1121255344521 is 1254435521211.

1121255344521 is a `hidden beast` number, since 1 + 1 + 2 + 12 + 553 + 44 + 52 + 1 = 666.

It is not a de Polignac number, because 1121255344521 - 2⁶ = 1121255344457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121255344511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122859271 + ... + 122868396.

It is an arithmetic number, because the mean of its divisors is an integer number (74946938740).

Almost surely, 2^{1121255344521} is an apocalyptic number.

It is an amenable number.

1121255344521 is a deficient number, since it is larger than the sum of its proper divisors (677471185239).

1121255344521 is a wasteful number, since it uses less digits than its factorization.

1121255344521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245727702 (or 245727683 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The spelling of 1121255344521 in words is "one trillion, one hundred twenty-one billion, two hundred fifty-five million, three hundred forty-four thousand, five hundred twenty-one".