12571021212 has 24 divisors (see below), whose sum is σ = 31057817616. Its totient is φ = 3943849728.

The previous prime is 12571021201. The next prime is 12571021231. The reversal of 12571021212 is 21212017521.

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 7 ways as a sum of consecutive naturals, for example, 30811123 + ... + 30811530.

It is an arithmetic number, because the mean of its divisors is an integer number (1294075734).

Almost surely, 2^12571021212 is an apocalyptic number.

12571021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12571021212 is an abundant number, since it is smaller than the sum of its proper divisors (18486796404).

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

12571021212 is a wasteful number, since it uses less digits than its factorization.

12571021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61622677 (or 61622675 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

Adding to 12571021212 its reverse (21212017521), we get a palindrome (33783038733).

The spelling of 12571021212 in words is "twelve billion, five hundred seventy-one million, twenty-one thousand, two hundred twelve".