12449209212 has 36 divisors (see below), whose sum is σ = 34329638616. Its totient is φ = 3772487520.

The previous prime is 12449209187. The next prime is 12449209219. The reversal of 12449209212 is 21290294421.

12449209212 is a `hidden beast` number, since 1 + 2 + 449 + 209 + 2 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12449209219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15718303 + ... + 15719094.

Almost surely, 2^12449209212 is an apocalyptic number.

12449209212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12449209212 is an abundant number, since it is smaller than the sum of its proper divisors (21880429404).

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

12449209212 is a wasteful number, since it uses less digits than its factorization.

12449209212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31437418 (or 31437413 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 12449209212 in words is "twelve billion, four hundred forty-nine million, two hundred nine thousand, two hundred twelve".