12211012321 has 4 divisors (see below), whose sum is σ = 12853697200. Its totient is φ = 11568327444.

The previous prime is 12211012301. The next prime is 12211012337. The reversal of 12211012321 is 12321011221.

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.

It is a cyclic number.

It is not a de Polignac number, because 12211012321 - 2⁷ = 12211012193 is a prime.

It is a super-2 number, since 2×12211012321² (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 = 12211012295 and 12211012304.

It is not an unprimeable number, because it can be changed into a prime (12211012301) 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, 321342411 + ... + 321342448.

It is an arithmetic number, because the mean of its divisors is an integer number (3213424300).

Almost surely, 2^12211012321 is an apocalyptic number.

It is an amenable number.

12211012321 is a deficient number, since it is larger than the sum of its proper divisors (642684879).

12211012321 is an equidigital number, since it uses as much as digits as its factorization.

12211012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642684878.

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

Adding to 12211012321 its reverse (12321011221), we get a palindrome (24532023542).

It can be divided in two parts, 122110 and 12321, that added together give a palindrome (134431).

The spelling of 12211012321 in words is "twelve billion, two hundred eleven million, twelve thousand, three hundred twenty-one".