12211312021 has 8 divisors (see below), whose sum is σ = 12610413824. Its totient is φ = 11812534560.

The previous prime is 12211312019. The next prime is 12211312037. The reversal of 12211312021 is 12021311221.

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

It is a cyclic number.

It is not a de Polignac number, because 12211312021 - 2¹ = 12211312019 is a prime.

It is a super-2 number, since 2×12211312021² (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 = 12211311986 and 12211312004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211312051) 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, 3360 + ... + 156313.

It is an arithmetic number, because the mean of its divisors is an integer number (1576301728).

Almost surely, 2^12211312021 is an apocalyptic number.

It is an amenable number.

12211312021 is a deficient number, since it is larger than the sum of its proper divisors (399101803).

12211312021 is a wasteful number, since it uses less digits than its factorization.

12211312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162171.

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

Adding to 12211312021 its reverse (12021311221), we get a palindrome (24232623242).

The spelling of 12211312021 in words is "twelve billion, two hundred eleven million, three hundred twelve thousand, twenty-one".