12221021202012 has 72 divisors (see below), whose sum is σ = 35306370540896. Its totient is φ = 3491601842304.

The previous prime is 12221021202007. The next prime is 12221021202037. The reversal of 12221021202012 is 21020212012221.

It is a happy number.

12221021202012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6755358 + ... + 8371194.

Almost surely, 2^{12221021202012} is an apocalyptic number.

12221021202012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221021202012 is an abundant number, since it is smaller than the sum of its proper divisors (23085349338884).

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

12221021202012 is a wasteful number, since it uses less digits than its factorization.

12221021202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645867 (or 1645862 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221021202012 its reverse (21020212012221), we get a palindrome (33241233214233).

The spelling of 12221021202012 in words is "twelve trillion, two hundred twenty-one billion, twenty-one million, two hundred two thousand, twelve".