1121521042 has 8 divisors (see below), whose sum is σ = 1781239356. Its totient is φ = 527774592.

The previous prime is 1121521021. The next prime is 1121521043. The reversal of 1121521042 is 2401251211.

It can be written as a sum of positive squares in 2 ways, for example, as 1121513121 + 7921 = 33489^2 + 89^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1121521043) 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 3 ways as a sum of consecutive naturals, for example, 16492923 + ... + 16492990.

Almost surely, 2^1121521042 is an apocalyptic number.

1121521042 is a deficient number, since it is larger than the sum of its proper divisors (659718314).

1121521042 is a wasteful number, since it uses less digits than its factorization.

1121521042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32985932.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 1121521042 is about 33489.1182625043. The cubic root of 1121521042 is about 1038.9687268556.

Adding to 1121521042 its reverse (2401251211), we get a palindrome (3522772253).

The spelling of 1121521042 in words is "one billion, one hundred twenty-one million, five hundred twenty-one thousand, forty-two".