12061957212 has 36 divisors (see below), whose sum is σ = 31619207256. Its totient is φ = 4020652080.

The previous prime is 12061957199. The next prime is 12061957213. The reversal of 12061957212 is 21275916021.

12061957212 is a `hidden beast` number, since 1 + 20 + 61 + 9 + 572 + 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 (12061957213) 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, 6203739 + ... + 6205682.

Almost surely, 2^12061957212 is an apocalyptic number.

12061957212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12061957212 is an abundant number, since it is smaller than the sum of its proper divisors (19557250044).

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

12061957212 is a wasteful number, since it uses less digits than its factorization.

12061957212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12409440 (or 12409426 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The spelling of 12061957212 in words is "twelve billion, sixty-one million, nine hundred fifty-seven thousand, two hundred twelve".