11323123021 has 8 divisors (see below), whose sum is σ = 13035170880. Its totient is φ = 9634689888.

The previous prime is 11323122991. The next prime is 11323123039. The reversal of 11323123021 is 12032132311.

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 11323123021 - 2¹¹ = 11323120973 is a prime.

It is a super-2 number, since 2×11323123021² (a number of 21 digits) contains 22 as substring.

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 11323123021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323123081) 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, 5902651 + ... + 5904568.

It is an arithmetic number, because the mean of its divisors is an integer number (1629396360).

Almost surely, 2^11323123021 is an apocalyptic number.

It is an amenable number.

11323123021 is a deficient number, since it is larger than the sum of its proper divisors (1712047859).

11323123021 is a wasteful number, since it uses less digits than its factorization.

11323123021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11807363.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11323123021 its reverse (12032132311), we get a palindrome (23355255332).

The spelling of 11323123021 in words is "eleven billion, three hundred twenty-three million, one hundred twenty-three thousand, twenty-one".