1121004432521 has 4 divisors (see below), whose sum is σ = 1122780985344. Its totient is φ = 1119227879700.

The previous prime is 1121004432467. The next prime is 1121004432557. The reversal of 1121004432521 is 1252344001211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121004432521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121004432421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888275465 + ... + 888276726.

It is an arithmetic number, because the mean of its divisors is an integer number (280695246336).

Almost surely, 2^{1121004432521} is an apocalyptic number.

It is an amenable number.

1121004432521 is a deficient number, since it is larger than the sum of its proper divisors (1776552823).

1121004432521 is an equidigital number, since it uses as much as digits as its factorization.

1121004432521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776552822.

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 1121004432521 its reverse (1252344001211), we get a palindrome (2373348433732).

The spelling of 1121004432521 in words is "one trillion, one hundred twenty-one billion, four million, four hundred thirty-two thousand, five hundred twenty-one".