12081621060 has 36 divisors (see below), whose sum is σ = 36647584428. Its totient is φ = 3221765568.

The previous prime is 12081621059. The next prime is 12081621061. The reversal of 12081621060 is 6012618021.

It is an interprime number because it is at equal distance from previous prime (12081621059) and next prime (12081621061).

It can be written as a sum of positive squares in 2 ways, for example, as 2247328836 + 9834292224 = 47406^2 + 99168^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12081621061) 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, 33559879 + ... + 33560238.

Almost surely, 2^12081621060 is an apocalyptic number.

12081621060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12081621060 is an abundant number, since it is smaller than the sum of its proper divisors (24565963368).

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

12081621060 is a wasteful number, since it uses less digits than its factorization.

12081621060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67120132 (or 67120127 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 12081621060 in words is "twelve billion, eighty-one million, six hundred twenty-one thousand, sixty".