1121253413545 has 32 divisors (see below), whose sum is σ = 1487687086080. Its totient is φ = 807461265600.

The previous prime is 1121253413509. The next prime is 1121253413549. The reversal of 1121253413545 is 5453143521211.

It is not a de Polignac number, because 1121253413545 - 2²⁵ = 1121219859113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121253413549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1369269 + ... + 2029138.

It is an arithmetic number, because the mean of its divisors is an integer number (46490221440).

Almost surely, 2^{1121253413545} is an apocalyptic number.

It is an amenable number.

1121253413545 is a deficient number, since it is larger than the sum of its proper divisors (366433672535).

1121253413545 is a wasteful number, since it uses less digits than its factorization.

1121253413545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3398605.

The product of its digits is 72000, while the sum is 37.

Adding to 1121253413545 its reverse (5453143521211), we get a palindrome (6574396934756).

The spelling of 1121253413545 in words is "one trillion, one hundred twenty-one billion, two hundred fifty-three million, four hundred thirteen thousand, five hundred forty-five".