1121343021 has 20 divisors (see below), whose sum is σ = 1700102272. Its totient is φ = 736400808.

The previous prime is 1121343019. The next prime is 1121343037. The reversal of 1121343021 is 1203431211.

1121343021 is a `hidden beast` number, since 1 + 1 + 213 + 430 + 21 = 666.

It is not a de Polignac number, because 1121343021 - 2¹ = 1121343019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1121342985 and 1121343003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121343011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 97885 + ... + 108738.

Almost surely, 2^1121343021 is an apocalyptic number.

It is an amenable number.

1121343021 is a deficient number, since it is larger than the sum of its proper divisors (578759251).

1121343021 is an equidigital number, since it uses as much as digits as its factorization.

1121343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206702 (or 206693 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1121343021 is about 33486.4602638141. The cubic root of 1121343021 is about 1038.9137515046.

Adding to 1121343021 its reverse (1203431211), we get a palindrome (2324774232).

The spelling of 1121343021 in words is "one billion, one hundred twenty-one million, three hundred forty-three thousand, twenty-one".