1123311303021 has 4 divisors (see below), whose sum is σ = 1497748404032. Its totient is φ = 748874202012.

The previous prime is 1123311302933. The next prime is 1123311303071. The reversal of 1123311303021 is 1203031133211.

It is a happy number.

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.

It is not a de Polignac number, because 1123311303021 - 2³⁰ = 1122237561197 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 (1123311303071) 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, 187218550501 + ... + 187218550506.

It is an arithmetic number, because the mean of its divisors is an integer number (374437101008).

Almost surely, 2^{1123311303021} is an apocalyptic number.

It is an amenable number.

1123311303021 is a deficient number, since it is larger than the sum of its proper divisors (374437101011).

1123311303021 is an equidigital number, since it uses as much as digits as its factorization.

1123311303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374437101010.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1123311303021 its reverse (1203031133211), we get a palindrome (2326342436232).

The spelling of 1123311303021 in words is "one trillion, one hundred twenty-three billion, three hundred eleven million, three hundred three thousand, twenty-one".