1121521043 has 2 divisors, whose sum is σ = 1121521044. Its totient is φ = 1121521042.

The previous prime is 1121521021. The next prime is 1121521057. The reversal of 1121521043 is 3401251211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121521043 - 2⁶ = 1121520979 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121521013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560760521 + 560760522.

It is an arithmetic number, because the mean of its divisors is an integer number (560760522).

Almost surely, 2^1121521043 is an apocalyptic number.

1121521043 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121521043 is an equidigital number, since it uses as much as digits as its factorization.

1121521043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1121521043 is about 33489.1182774345. The cubic root of 1121521043 is about 1038.9687271644.

Adding to 1121521043 its reverse (3401251211), we get a palindrome (4522772254).

The spelling of 1121521043 in words is "one billion, one hundred twenty-one million, five hundred twenty-one thousand, forty-three".