1121436521 has 16 divisors (see below), whose sum is σ = 1152403200. Its totient is φ = 1091021568.

The previous prime is 1121436509. The next prime is 1121436539. The reversal of 1121436521 is 1256341211.

It is a cyclic number.

It is not a de Polignac number, because 1121436521 - 2⁶ = 1121436457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121436721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2401130 + ... + 2401596.

It is an arithmetic number, because the mean of its divisors is an integer number (72025200).

Almost surely, 2^1121436521 is an apocalyptic number.

It is an amenable number.

1121436521 is a deficient number, since it is larger than the sum of its proper divisors (30966679).

1121436521 is a wasteful number, since it uses less digits than its factorization.

1121436521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928.

The product of its digits is 1440, while the sum is 26.

The square root of 1121436521 is about 33487.8563213592. The cubic root of 1121436521 is about 1038.9426263253.

Adding to 1121436521 its reverse (1256341211), we get a palindrome (2377777732).

The spelling of 1121436521 in words is "one billion, one hundred twenty-one million, four hundred thirty-six thousand, five hundred twenty-one".