12310221 has 48 divisors (see below), whose sum is σ = 21800448. Its totient is φ = 6098400.

The previous prime is 12310219. The next prime is 12310223. The reversal of 12310221 is 12201321.

It is an interprime number because it is at equal distance from previous prime (12310219) and next prime (12310223).

It is not a de Polignac number, because 12310221 - 2¹ = 12310219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12310197 and 12310206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12310223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37026 + ... + 37356.

It is an arithmetic number, because the mean of its divisors is an integer number (454176).

Almost surely, 2^12310221 is an apocalyptic number.

12310221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12310221 is a deficient number, since it is larger than the sum of its proper divisors (9490227).

12310221 is a wasteful number, since it uses less digits than its factorization.

12310221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 12310221 is about 3508.5924528221. The cubic root of 12310221 is about 230.8989456978.

Adding to 12310221 its reverse (12201321), we get a palindrome (24511542).

Subtracting from 12310221 its reverse (12201321), we obtain a square (108900 = 330²).

The spelling of 12310221 in words is "twelve million, three hundred ten thousand, two hundred twenty-one".