1121232401 has 4 divisors (see below), whose sum is σ = 1140236400. Its totient is φ = 1102228404.

The previous prime is 1121232391. The next prime is 1121232421. The reversal of 1121232401 is 1042321211.

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: 1042321211 = 67 ⋅15557033.

It is a cyclic number.

It is not a de Polignac number, because 1121232401 - 2³⁰ = 47490577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1121232401.

It is not an unprimeable number, because it can be changed into a prime (1121232421) 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, 9501911 + ... + 9502028.

It is an arithmetic number, because the mean of its divisors is an integer number (285059100).

Almost surely, 2^1121232401 is an apocalyptic number.

It is an amenable number.

1121232401 is a deficient number, since it is larger than the sum of its proper divisors (19003999).

1121232401 is an equidigital number, since it uses as much as digits as its factorization.

1121232401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19003998.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1121232401 is about 33484.8085107262. The cubic root of 1121232401 is about 1038.8795875850.

Adding to 1121232401 its reverse (1042321211), we get a palindrome (2163553612).

The spelling of 1121232401 in words is "one billion, one hundred twenty-one million, two hundred thirty-two thousand, four hundred one".