12313021 has 4 divisors (see below), whose sum is σ = 14072032. Its totient is φ = 10554012.

The previous prime is 12313003. The next prime is 12313043. The reversal of 12313021 is 12031321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12031321 = 467 ⋅25763.

It is not a de Polignac number, because 12313021 - 2¹³ = 12304829 is a prime.

It is a super-2 number, since 2×12313021² = 303220972292882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312992 and 12313010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310021) 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, 879495 + ... + 879508.

It is an arithmetic number, because the mean of its divisors is an integer number (3518008).

Almost surely, 2^12313021 is an apocalyptic number.

It is an amenable number.

12313021 is a deficient number, since it is larger than the sum of its proper divisors (1759011).

12313021 is an equidigital number, since it uses as much as digits as its factorization.

12313021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1759010.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 12313021 is about 3508.9914505453. The cubic root of 12313021 is about 230.9164506106.

Adding to 12313021 its reverse (12031321), we get a palindrome (24344342).

The spelling of 12313021 in words is "twelve million, three hundred thirteen thousand, twenty-one".