12001222012 has 72 divisors (see below), whose sum is σ = 24668001792. Its totient is φ = 5085849600.

The previous prime is 12001222001. The next prime is 12001222019. The reversal of 12001222012 is 21022210021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 12001221983 and 12001222001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222019) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 458437 + ... + 483907.

It is an arithmetic number, because the mean of its divisors is an integer number (342611136).

Almost surely, 2^12001222012 is an apocalyptic number.

It is an amenable number.

12001222012 is an abundant number, since it is smaller than the sum of its proper divisors (12666779780).

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

12001222012 is a wasteful number, since it uses less digits than its factorization.

12001222012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25559 (or 25544 counting only the distinct ones).

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

Adding to 12001222012 its reverse (21022210021), we get a palindrome (33023432033).

The spelling of 12001222012 in words is "twelve billion, one million, two hundred twenty-two thousand, twelve".