12212020028 has 24 divisors (see below), whose sum is σ = 23306297280. Its totient is φ = 5564969280.

The previous prime is 12212020021. The next prime is 12212020049. The reversal of 12212020028 is 82002021221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12212019991 and 12212020009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212020021) 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 7 ways as a sum of consecutive naturals, for example, 1482263 + ... + 1490478.

It is an arithmetic number, because the mean of its divisors is an integer number (971095720).

Almost surely, 2^12212020028 is an apocalyptic number.

It is an amenable number.

12212020028 is a deficient number, since it is larger than the sum of its proper divisors (11094277252).

12212020028 is a wasteful number, since it uses less digits than its factorization.

12212020028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2972837 (or 2972835 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12212020028 its reverse (82002021221), we get a palindrome (94214041249).

The spelling of 12212020028 in words is "twelve billion, two hundred twelve million, twenty thousand, twenty-eight".