1121304421 has 4 divisors (see below), whose sum is σ = 1147381312. Its totient is φ = 1095227532.

The previous prime is 1121304419. The next prime is 1121304439. The reversal of 1121304421 is 1244031211.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1244031211 = 53 ⋅23472287.

It is a cyclic number.

It is not a de Polignac number, because 1121304421 - 2¹ = 1121304419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121304461) 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, 13038381 + ... + 13038466.

It is an arithmetic number, because the mean of its divisors is an integer number (286845328).

Almost surely, 2^1121304421 is an apocalyptic number.

It is an amenable number.

1121304421 is a deficient number, since it is larger than the sum of its proper divisors (26076891).

1121304421 is an equidigital number, since it uses as much as digits as its factorization.

1121304421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26076890.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1121304421 is about 33485.8839065060. The cubic root of 1121304421 is about 1038.9018305223.

Adding to 1121304421 its reverse (1244031211), we get a palindrome (2365335632).

The spelling of 1121304421 in words is "one billion, one hundred twenty-one million, three hundred four thousand, four hundred twenty-one".