12861151212 has 96 divisors (see below), whose sum is σ = 37065989632. Its totient is φ = 3379885056.

The previous prime is 12861151211. The next prime is 12861151279. The reversal of 12861151212 is 21215116821.

It is a self number, because there is not a number n which added to its sum of digits gives 12861151212.

It is not an unprimeable number, because it can be changed into a prime (12861151211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 288228 + ... + 329844.

Almost surely, 2^12861151212 is an apocalyptic number.

12861151212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12861151212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18532994816).

12861151212 is an abundant number, since it is smaller than the sum of its proper divisors (24204838420).

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

12861151212 is a wasteful number, since it uses less digits than its factorization.

12861151212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41927 (or 41925 counting only the distinct ones).

The product of its digits is 1920, while the sum is 30.

The spelling of 12861151212 in words is "twelve billion, eight hundred sixty-one million, one hundred fifty-one thousand, two hundred twelve".