12021320212 has 48 divisors (see below), whose sum is σ = 23544206784. Its totient is φ = 5323104000.

The previous prime is 12021320173. The next prime is 12021320243. The reversal of 12021320212 is 21202312021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317787 + ... + 1326877.

It is an arithmetic number, because the mean of its divisors is an integer number (490504308).

Almost surely, 2^12021320212 is an apocalyptic number.

It is an amenable number.

12021320212 is a deficient number, since it is larger than the sum of its proper divisors (11522886572).

12021320212 is a wasteful number, since it uses less digits than its factorization.

12021320212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9880 (or 9878 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12021320212 its reverse (21202312021), we get a palindrome (33223632233).

It can be divided in two parts, 12021 and 320212, that added together give a palindrome (332233).

The spelling of 12021320212 in words is "twelve billion, twenty-one million, three hundred twenty thousand, two hundred twelve".