1123013021 has 8 divisors (see below), whose sum is σ = 1229897760. Its totient is φ = 1019056752.

The previous prime is 1123013009. The next prime is 1123013029. The reversal of 1123013021 is 1203103211.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123013021 is a prime.

It is a super-2 number, since 2×1123013021² = 2522316490671092882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1123012987 and 1123013005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123013029) 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, 731315 + ... + 732848.

It is an arithmetic number, because the mean of its divisors is an integer number (153737220).

Almost surely, 2^1123013021 is an apocalyptic number.

It is an amenable number.

1123013021 is a deficient number, since it is larger than the sum of its proper divisors (106884739).

1123013021 is a wasteful number, since it uses less digits than its factorization.

1123013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1464235.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1123013021 is about 33511.3864380452. The cubic root of 1123013021 is about 1039.4292421106.

Adding to 1123013021 its reverse (1203103211), we get a palindrome (2326116232).

The spelling of 1123013021 in words is "one billion, one hundred twenty-three million, thirteen thousand, twenty-one".