12020220021 has 16 divisors (see below), whose sum is σ = 16872811200. Its totient is φ = 7590670848.

The previous prime is 12020220001. The next prime is 12020220029. The reversal of 12020220021 is 12002202021.

It is not a de Polignac number, because 12020220021 - 2⁵ = 12020219989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12020219979 and 12020220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020220029) 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, 776485 + ... + 791813.

It is an arithmetic number, because the mean of its divisors is an integer number (1054550700).

Almost surely, 2^12020220021 is an apocalyptic number.

It is an amenable number.

12020220021 is a deficient number, since it is larger than the sum of its proper divisors (4852591179).

12020220021 is a wasteful number, since it uses less digits than its factorization.

12020220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29108.

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

Adding to 12020220021 its reverse (12002202021), we get a palindrome (24022422042).

The spelling of 12020220021 in words is "twelve billion, twenty million, two hundred twenty thousand, twenty-one".