12211002021 has 16 divisors (see below), whose sum is σ = 17082065408. Its totient is φ = 7748913600.

The previous prime is 12211002019. The next prime is 12211002053. The reversal of 12211002021 is 12020011221.

It is not a de Polignac number, because 12211002021 - 2¹ = 12211002019 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12211001988 and 12211002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211006021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1070566 + ... + 1081911.

It is an arithmetic number, because the mean of its divisors is an integer number (1067629088).

Almost surely, 2^12211002021 is an apocalyptic number.

It is an amenable number.

12211002021 is a deficient number, since it is larger than the sum of its proper divisors (4871063387).

12211002021 is a wasteful number, since it uses less digits than its factorization.

12211002021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2152572.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12211002021 its reverse (12020011221), we get a palindrome (24231013242).

The spelling of 12211002021 in words is "twelve billion, two hundred eleven million, two thousand, twenty-one".