12320221213031 has 4 divisors (see below), whose sum is σ = 12468657613272. Its totient is φ = 12171784812792.

The previous prime is 12320221213009. The next prime is 12320221213049. The reversal of 12320221213031 is 13031212202321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12320221213031 is a prime.

It is a super-2 number, since 2×12320221213031² (a number of 27 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 = 12320221212988 and 12320221213006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12320221213051) 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, 74218199996 + ... + 74218200161.

It is an arithmetic number, because the mean of its divisors is an integer number (3117164403318).

Almost surely, 2^{12320221213031} is an apocalyptic number.

12320221213031 is a deficient number, since it is larger than the sum of its proper divisors (148436400241).

12320221213031 is an equidigital number, since it uses as much as digits as its factorization.

12320221213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148436400240.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 12320221213031 its reverse (13031212202321), we get a palindrome (25351433415352).

The spelling of 12320221213031 in words is "twelve trillion, three hundred twenty billion, two hundred twenty-one million, two hundred thirteen thousand, thirty-one".