12201021012 has 24 divisors (see below), whose sum is σ = 28484078112. Its totient is φ = 4064860000.

The previous prime is 12201021011. The next prime is 12201021031. The reversal of 12201021012 is 21012010221.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12201021011) 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, 244614 + ... + 290237.

It is an arithmetic number, because the mean of its divisors is an integer number (1186836588).

Almost surely, 2^12201021012 is an apocalyptic number.

12201021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12201021012 is an abundant number, since it is smaller than the sum of its proper divisors (16283057100).

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

12201021012 is a wasteful number, since it uses less digits than its factorization.

12201021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536759 (or 536757 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12201021012 its reverse (21012010221), we get a palindrome (33213031233).

The spelling of 12201021012 in words is "twelve billion, two hundred one million, twenty-one thousand, twelve".