12200220021 has 16 divisors (see below), whose sum is σ = 18158469120. Its totient is φ = 7222116720.

The previous prime is 12200220007. The next prime is 12200220031. The reversal of 12200220021 is 12002200221.

It is not a de Polignac number, because 12200220021 - 2¹¹ = 12200217973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12200219979 and 12200220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12200220031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4297461 + ... + 4300298.

It is an arithmetic number, because the mean of its divisors is an integer number (1134904320).

Almost surely, 2^12200220021 is an apocalyptic number.

12200220021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12200220021 is a deficient number, since it is larger than the sum of its proper divisors (5958249099).

12200220021 is a wasteful number, since it uses less digits than its factorization.

12200220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8597816.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 12200220021 its reverse (12002200221), we get a palindrome (24202420242).

It can be divided in two parts, 12200 and 220021, that added together give a triangular number (232221 = T₆₈₁).

The spelling of 12200220021 in words is "twelve billion, two hundred million, two hundred twenty thousand, twenty-one".