12021211321 has 8 divisors (see below), whose sum is σ = 13829512064. Its totient is φ = 10235656800.

The previous prime is 12021211277. The next prime is 12021211331. The reversal of 12021211321 is 12311212021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12021211321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12021211295 and 12021211304.

It is not an unprimeable number, because it can be changed into a prime (12021211331) 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, 5685420 + ... + 5687533.

It is an arithmetic number, because the mean of its divisors is an integer number (1728689008).

Almost surely, 2^12021211321 is an apocalyptic number.

It is an amenable number.

12021211321 is a deficient number, since it is larger than the sum of its proper divisors (1808300743).

12021211321 is a wasteful number, since it uses less digits than its factorization.

12021211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11373111.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12021211321 its reverse (12311212021), we get a palindrome (24332423342).

The spelling of 12021211321 in words is "twelve billion, twenty-one million, two hundred eleven thousand, three hundred twenty-one".