12212120020 has 48 divisors (see below), whose sum is σ = 26774149248. Its totient is φ = 4670075520.

The previous prime is 12212120003. The next prime is 12212120033. The reversal of 12212120020 is 2002121221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 1085062 + ... + 1096258.

It is an arithmetic number, because the mean of its divisors is an integer number (557794776).

Almost surely, 2^12212120020 is an apocalyptic number.

12212120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212120020 is an abundant number, since it is smaller than the sum of its proper divisors (14562029228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12212120020 is a wasteful number, since it uses less digits than its factorization.

12212120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13600 (or 13598 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12212120020 its reverse (2002121221), we get a palindrome (14214241241).

The spelling of 12212120020 in words is "twelve billion, two hundred twelve million, one hundred twenty thousand, twenty".