12311030021 has 8 divisors (see below), whose sum is σ = 12412147800. Its totient is φ = 12210075648.

The previous prime is 12311030003. The next prime is 12311030051. The reversal of 12311030021 is 12003011321.

It can be written as a sum of positive squares in 4 ways, for example, as 137217796 + 12173812225 = 11714^2 + 110335^2 .

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 12311030021 - 2⁶ = 12311029957 is a prime.

It is a super-2 number, since 2×12311030021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12311029978 and 12311030005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311030051) 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, 112805 + ... + 193253.

It is an arithmetic number, because the mean of its divisors is an integer number (1551518475).

Almost surely, 2^12311030021 is an apocalyptic number.

It is an amenable number.

12311030021 is a deficient number, since it is larger than the sum of its proper divisors (101117779).

12311030021 is a wasteful number, since it uses less digits than its factorization.

12311030021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81703.

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

Adding to 12311030021 its reverse (12003011321), we get a palindrome (24314041342).

The spelling of 12311030021 in words is "twelve billion, three hundred eleven million, thirty thousand, twenty-one".