1123211021 has 8 divisors (see below), whose sum is σ = 1134432000. Its totient is φ = 1112039440.

The previous prime is 1123210969. The next prime is 1123211039. The reversal of 1123211021 is 1201123211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123211021 - 2³⁰ = 49469197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123210987 and 1123211005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123211071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34220 + ... + 58458.

It is an arithmetic number, because the mean of its divisors is an integer number (141804000).

Almost surely, 2^1123211021 is an apocalyptic number.

It is an amenable number.

1123211021 is a deficient number, since it is larger than the sum of its proper divisors (11220979).

1123211021 is a wasteful number, since it uses less digits than its factorization.

1123211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24699.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 1123211021 is about 33514.3405276010. The cubic root of 1123211021 is about 1039.4903262631.

Adding to 1123211021 its reverse (1201123211), we get a palindrome (2324334232).

The spelling of 1123211021 in words is "one billion, one hundred twenty-three million, two hundred eleven thousand, twenty-one".